diff --git a/generation_config.yaml b/generation_config.yaml
index 1463b4e076..e7a52c35a2 100644
--- a/generation_config.yaml
+++ b/generation_config.yaml
@@ -1,4 +1,4 @@
-googleapis_commitish: 5f6048b0222ddc57826fbbd254ea3197e2db82f3
+googleapis_commitish: 77c78e90aeeb1c4612e9ab772c90bc40748a7a19
 # the libraries are ordered with respect to library name, which is
 # java-{library.library_name} or java-{library.api-shortname} when
 # library.library_name is not defined.
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BackendProto.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BackendProto.java
index d6c715f9db..6f2797ece9 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BackendProto.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BackendProto.java
@@ -65,7 +65,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "\030google/api/backend.proto\022\n"
           + "google.api\"1\n"
           + "\007Backend\022&\n"
-          + "\005rules\030\001 \003(\0132\027.google.api.BackendRule\"\262\004\n"
+          + "\005rules\030\001 \003(\0132\027.google.api.BackendRule\"\321\004\n"
           + "\013BackendRule\022\020\n"
           + "\010selector\030\001 \001(\t\022\017\n"
           + "\007address\030\002 \001(\t\022\020\n"
@@ -78,7 +78,8 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "\014disable_auth\030\010 \001(\010H\000\022\020\n"
           + "\010protocol\030\t \001(\t\022^\n"
           + "\035overrides_by_request_protocol\030\n"
-          + " \003(\01327.google.api.BackendRule.OverridesByRequestProtocolEntry\032Z\n"
+          + " \003(\01327.google.api.BackendRule.OverridesByRequestProtocolEntry\022\035\n"
+          + "\025load_balancing_policy\030\013 \001(\t\032Z\n"
           + "\037OverridesByRequestProtocolEntry\022\013\n"
           + "\003key\030\001 \001(\t\022&\n"
           + "\005value\030\002 \001(\0132\027.google.api.BackendRule:\0028\001\"e\n"
@@ -87,8 +88,8 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "\020CONSTANT_ADDRESS\020\001\022\032\n"
           + "\026APPEND_PATH_TO_ADDRESS\020\002B\020\n"
           + "\016authenticationBn\n"
-          + "\016com.google.apiB\014BackendProtoP\001ZEgoogle.golang.org/genproto/goo"
-          + "gleapis/api/serviceconfig;serviceconfig\242\002\004GAPIb\006proto3"
+          + "\016com.google.apiB\014BackendProtoP\001ZEgoogle.golang.org/genproto/googleapis/a"
+          + "pi/serviceconfig;serviceconfig\242\002\004GAPIb\006proto3"
     };
     descriptor =
         com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
@@ -115,6 +116,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
               "DisableAuth",
               "Protocol",
               "OverridesByRequestProtocol",
+              "LoadBalancingPolicy",
               "Authentication",
             });
     internal_static_google_api_BackendRule_OverridesByRequestProtocolEntry_descriptor =
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BackendRule.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BackendRule.java
index f21406c92a..627149be5e 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BackendRule.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BackendRule.java
@@ -56,6 +56,7 @@ private BackendRule() {
     address_ = "";
     pathTranslation_ = 0;
     protocol_ = "";
+    loadBalancingPolicy_ = "";
   }
 
   public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
@@ -589,6 +590,15 @@ public double getOperationDeadline() {
   private int pathTranslation_ = 0;
 
   /**
+   *
+   *
+   * <pre>
+   * Path translation specifies how to combine the backend address with the
+   * request path in order to produce the appropriate forwarding URL for the
+   * request. See [PathTranslation][google.api.BackendRule.PathTranslation] for
+   * more details.
+   * </pre>
+   *
    * <code>.google.api.BackendRule.PathTranslation path_translation = 6;</code>
    *
    * @return The enum numeric value on the wire for pathTranslation.
@@ -599,6 +609,15 @@ public int getPathTranslationValue() {
   }
 
   /**
+   *
+   *
+   * <pre>
+   * Path translation specifies how to combine the backend address with the
+   * request path in order to produce the appropriate forwarding URL for the
+   * request. See [PathTranslation][google.api.BackendRule.PathTranslation] for
+   * more details.
+   * </pre>
+   *
    * <code>.google.api.BackendRule.PathTranslation path_translation = 6;</code>
    *
    * @return The pathTranslation.
@@ -941,6 +960,67 @@ public com.google.api.BackendRule getOverridesByRequestProtocolOrThrow(java.lang
     return map.get(key);
   }
 
+  public static final int LOAD_BALANCING_POLICY_FIELD_NUMBER = 11;
+
+  @SuppressWarnings("serial")
+  private volatile java.lang.Object loadBalancingPolicy_ = "";
+
+  /**
+   *
+   *
+   * <pre>
+   * The load balancing policy used for connection to the application backend.
+   *
+   * Defined as an arbitrary string to accomondate custom load balancing
+   * policies supported by the underlying channel, but suggest most users use
+   * one of the standard policies, such as the default, "RoundRobin".
+   * </pre>
+   *
+   * <code>string load_balancing_policy = 11;</code>
+   *
+   * @return The loadBalancingPolicy.
+   */
+  @java.lang.Override
+  public java.lang.String getLoadBalancingPolicy() {
+    java.lang.Object ref = loadBalancingPolicy_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      loadBalancingPolicy_ = s;
+      return s;
+    }
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * The load balancing policy used for connection to the application backend.
+   *
+   * Defined as an arbitrary string to accomondate custom load balancing
+   * policies supported by the underlying channel, but suggest most users use
+   * one of the standard policies, such as the default, "RoundRobin".
+   * </pre>
+   *
+   * <code>string load_balancing_policy = 11;</code>
+   *
+   * @return The bytes for loadBalancingPolicy.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getLoadBalancingPolicyBytes() {
+    java.lang.Object ref = loadBalancingPolicy_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      loadBalancingPolicy_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
   private byte memoizedIsInitialized = -1;
 
   @java.lang.Override
@@ -988,6 +1068,9 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
         internalGetOverridesByRequestProtocol(),
         OverridesByRequestProtocolDefaultEntryHolder.defaultEntry,
         10);
+    if (!com.google.protobuf.GeneratedMessage.isStringEmpty(loadBalancingPolicy_)) {
+      com.google.protobuf.GeneratedMessage.writeString(output, 11, loadBalancingPolicy_);
+    }
     getUnknownFields().writeTo(output);
   }
 
@@ -1040,6 +1123,9 @@ public int getSerializedSize() {
           com.google.protobuf.CodedOutputStream.computeMessageSize(
               10, overridesByRequestProtocol__);
     }
+    if (!com.google.protobuf.GeneratedMessage.isStringEmpty(loadBalancingPolicy_)) {
+      size += com.google.protobuf.GeneratedMessage.computeStringSize(11, loadBalancingPolicy_);
+    }
     size += getUnknownFields().getSerializedSize();
     memoizedSize = size;
     return size;
@@ -1067,6 +1153,7 @@ public boolean equals(final java.lang.Object obj) {
     if (!getProtocol().equals(other.getProtocol())) return false;
     if (!internalGetOverridesByRequestProtocol()
         .equals(other.internalGetOverridesByRequestProtocol())) return false;
+    if (!getLoadBalancingPolicy().equals(other.getLoadBalancingPolicy())) return false;
     if (!getAuthenticationCase().equals(other.getAuthenticationCase())) return false;
     switch (authenticationCase_) {
       case 7:
@@ -1116,6 +1203,8 @@ public int hashCode() {
       hash = (37 * hash) + OVERRIDES_BY_REQUEST_PROTOCOL_FIELD_NUMBER;
       hash = (53 * hash) + internalGetOverridesByRequestProtocol().hashCode();
     }
+    hash = (37 * hash) + LOAD_BALANCING_POLICY_FIELD_NUMBER;
+    hash = (53 * hash) + getLoadBalancingPolicy().hashCode();
     switch (authenticationCase_) {
       case 7:
         hash = (37 * hash) + JWT_AUDIENCE_FIELD_NUMBER;
@@ -1294,6 +1383,7 @@ public Builder clear() {
       pathTranslation_ = 0;
       protocol_ = "";
       internalGetMutableOverridesByRequestProtocol().clear();
+      loadBalancingPolicy_ = "";
       authenticationCase_ = 0;
       authentication_ = null;
       return this;
@@ -1357,6 +1447,9 @@ private void buildPartial0(com.google.api.BackendRule result) {
             internalGetOverridesByRequestProtocol()
                 .build(OverridesByRequestProtocolDefaultEntryHolder.defaultEntry);
       }
+      if (((from_bitField0_ & 0x00000400) != 0)) {
+        result.loadBalancingPolicy_ = loadBalancingPolicy_;
+      }
     }
 
     private void buildPartialOneofs(com.google.api.BackendRule result) {
@@ -1406,6 +1499,11 @@ public Builder mergeFrom(com.google.api.BackendRule other) {
       internalGetMutableOverridesByRequestProtocol()
           .mergeFrom(other.internalGetOverridesByRequestProtocol());
       bitField0_ |= 0x00000200;
+      if (!other.getLoadBalancingPolicy().isEmpty()) {
+        loadBalancingPolicy_ = other.loadBalancingPolicy_;
+        bitField0_ |= 0x00000400;
+        onChanged();
+      }
       switch (other.getAuthenticationCase()) {
         case JWT_AUDIENCE:
           {
@@ -1521,6 +1619,12 @@ public Builder mergeFrom(
                 bitField0_ |= 0x00000200;
                 break;
               } // case 82
+            case 90:
+              {
+                loadBalancingPolicy_ = input.readStringRequireUtf8();
+                bitField0_ |= 0x00000400;
+                break;
+              } // case 90
             default:
               {
                 if (!super.parseUnknownField(input, extensionRegistry, tag)) {
@@ -2072,6 +2176,15 @@ public Builder clearOperationDeadline() {
     private int pathTranslation_ = 0;
 
     /**
+     *
+     *
+     * <pre>
+     * Path translation specifies how to combine the backend address with the
+     * request path in order to produce the appropriate forwarding URL for the
+     * request. See [PathTranslation][google.api.BackendRule.PathTranslation] for
+     * more details.
+     * </pre>
+     *
      * <code>.google.api.BackendRule.PathTranslation path_translation = 6;</code>
      *
      * @return The enum numeric value on the wire for pathTranslation.
@@ -2082,6 +2195,15 @@ public int getPathTranslationValue() {
     }
 
     /**
+     *
+     *
+     * <pre>
+     * Path translation specifies how to combine the backend address with the
+     * request path in order to produce the appropriate forwarding URL for the
+     * request. See [PathTranslation][google.api.BackendRule.PathTranslation] for
+     * more details.
+     * </pre>
+     *
      * <code>.google.api.BackendRule.PathTranslation path_translation = 6;</code>
      *
      * @param value The enum numeric value on the wire for pathTranslation to set.
@@ -2095,6 +2217,15 @@ public Builder setPathTranslationValue(int value) {
     }
 
     /**
+     *
+     *
+     * <pre>
+     * Path translation specifies how to combine the backend address with the
+     * request path in order to produce the appropriate forwarding URL for the
+     * request. See [PathTranslation][google.api.BackendRule.PathTranslation] for
+     * more details.
+     * </pre>
+     *
      * <code>.google.api.BackendRule.PathTranslation path_translation = 6;</code>
      *
      * @return The pathTranslation.
@@ -2107,6 +2238,15 @@ public com.google.api.BackendRule.PathTranslation getPathTranslation() {
     }
 
     /**
+     *
+     *
+     * <pre>
+     * Path translation specifies how to combine the backend address with the
+     * request path in order to produce the appropriate forwarding URL for the
+     * request. See [PathTranslation][google.api.BackendRule.PathTranslation] for
+     * more details.
+     * </pre>
+     *
      * <code>.google.api.BackendRule.PathTranslation path_translation = 6;</code>
      *
      * @param value The pathTranslation to set.
@@ -2123,6 +2263,15 @@ public Builder setPathTranslation(com.google.api.BackendRule.PathTranslation val
     }
 
     /**
+     *
+     *
+     * <pre>
+     * Path translation specifies how to combine the backend address with the
+     * request path in order to produce the appropriate forwarding URL for the
+     * request. See [PathTranslation][google.api.BackendRule.PathTranslation] for
+     * more details.
+     * </pre>
+     *
      * <code>.google.api.BackendRule.PathTranslation path_translation = 6;</code>
      *
      * @return This builder for chaining.
@@ -2827,6 +2976,137 @@ public com.google.api.BackendRule.Builder putOverridesByRequestProtocolBuilderIf
       return (com.google.api.BackendRule.Builder) entry;
     }
 
+    private java.lang.Object loadBalancingPolicy_ = "";
+
+    /**
+     *
+     *
+     * <pre>
+     * The load balancing policy used for connection to the application backend.
+     *
+     * Defined as an arbitrary string to accomondate custom load balancing
+     * policies supported by the underlying channel, but suggest most users use
+     * one of the standard policies, such as the default, "RoundRobin".
+     * </pre>
+     *
+     * <code>string load_balancing_policy = 11;</code>
+     *
+     * @return The loadBalancingPolicy.
+     */
+    public java.lang.String getLoadBalancingPolicy() {
+      java.lang.Object ref = loadBalancingPolicy_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        loadBalancingPolicy_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The load balancing policy used for connection to the application backend.
+     *
+     * Defined as an arbitrary string to accomondate custom load balancing
+     * policies supported by the underlying channel, but suggest most users use
+     * one of the standard policies, such as the default, "RoundRobin".
+     * </pre>
+     *
+     * <code>string load_balancing_policy = 11;</code>
+     *
+     * @return The bytes for loadBalancingPolicy.
+     */
+    public com.google.protobuf.ByteString getLoadBalancingPolicyBytes() {
+      java.lang.Object ref = loadBalancingPolicy_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        loadBalancingPolicy_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The load balancing policy used for connection to the application backend.
+     *
+     * Defined as an arbitrary string to accomondate custom load balancing
+     * policies supported by the underlying channel, but suggest most users use
+     * one of the standard policies, such as the default, "RoundRobin".
+     * </pre>
+     *
+     * <code>string load_balancing_policy = 11;</code>
+     *
+     * @param value The loadBalancingPolicy to set.
+     * @return This builder for chaining.
+     */
+    public Builder setLoadBalancingPolicy(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      loadBalancingPolicy_ = value;
+      bitField0_ |= 0x00000400;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The load balancing policy used for connection to the application backend.
+     *
+     * Defined as an arbitrary string to accomondate custom load balancing
+     * policies supported by the underlying channel, but suggest most users use
+     * one of the standard policies, such as the default, "RoundRobin".
+     * </pre>
+     *
+     * <code>string load_balancing_policy = 11;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearLoadBalancingPolicy() {
+      loadBalancingPolicy_ = getDefaultInstance().getLoadBalancingPolicy();
+      bitField0_ = (bitField0_ & ~0x00000400);
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The load balancing policy used for connection to the application backend.
+     *
+     * Defined as an arbitrary string to accomondate custom load balancing
+     * policies supported by the underlying channel, but suggest most users use
+     * one of the standard policies, such as the default, "RoundRobin".
+     * </pre>
+     *
+     * <code>string load_balancing_policy = 11;</code>
+     *
+     * @param value The bytes for loadBalancingPolicy to set.
+     * @return This builder for chaining.
+     */
+    public Builder setLoadBalancingPolicyBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+      loadBalancingPolicy_ = value;
+      bitField0_ |= 0x00000400;
+      onChanged();
+      return this;
+    }
+
     // @@protoc_insertion_point(builder_scope:google.api.BackendRule)
   }
 
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BackendRuleOrBuilder.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BackendRuleOrBuilder.java
index 1adcf011da..6017784e63 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BackendRuleOrBuilder.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BackendRuleOrBuilder.java
@@ -167,6 +167,15 @@ public interface BackendRuleOrBuilder
   double getOperationDeadline();
 
   /**
+   *
+   *
+   * <pre>
+   * Path translation specifies how to combine the backend address with the
+   * request path in order to produce the appropriate forwarding URL for the
+   * request. See [PathTranslation][google.api.BackendRule.PathTranslation] for
+   * more details.
+   * </pre>
+   *
    * <code>.google.api.BackendRule.PathTranslation path_translation = 6;</code>
    *
    * @return The enum numeric value on the wire for pathTranslation.
@@ -174,6 +183,15 @@ public interface BackendRuleOrBuilder
   int getPathTranslationValue();
 
   /**
+   *
+   *
+   * <pre>
+   * Path translation specifies how to combine the backend address with the
+   * request path in order to produce the appropriate forwarding URL for the
+   * request. See [PathTranslation][google.api.BackendRule.PathTranslation] for
+   * more details.
+   * </pre>
+   *
    * <code>.google.api.BackendRule.PathTranslation path_translation = 6;</code>
    *
    * @return The pathTranslation.
@@ -386,5 +404,39 @@ com.google.api.BackendRule getOverridesByRequestProtocolOrDefault(
    */
   com.google.api.BackendRule getOverridesByRequestProtocolOrThrow(java.lang.String key);
 
+  /**
+   *
+   *
+   * <pre>
+   * The load balancing policy used for connection to the application backend.
+   *
+   * Defined as an arbitrary string to accomondate custom load balancing
+   * policies supported by the underlying channel, but suggest most users use
+   * one of the standard policies, such as the default, "RoundRobin".
+   * </pre>
+   *
+   * <code>string load_balancing_policy = 11;</code>
+   *
+   * @return The loadBalancingPolicy.
+   */
+  java.lang.String getLoadBalancingPolicy();
+
+  /**
+   *
+   *
+   * <pre>
+   * The load balancing policy used for connection to the application backend.
+   *
+   * Defined as an arbitrary string to accomondate custom load balancing
+   * policies supported by the underlying channel, but suggest most users use
+   * one of the standard policies, such as the default, "RoundRobin".
+   * </pre>
+   *
+   * <code>string load_balancing_policy = 11;</code>
+   *
+   * @return The bytes for loadBalancingPolicy.
+   */
+  com.google.protobuf.ByteString getLoadBalancingPolicyBytes();
+
   com.google.api.BackendRule.AuthenticationCase getAuthenticationCase();
 }
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BatchingConfigProto.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BatchingConfigProto.java
new file mode 100644
index 0000000000..109cd1e0fe
--- /dev/null
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BatchingConfigProto.java
@@ -0,0 +1,974 @@
+/*
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// NO CHECKED-IN PROTOBUF GENCODE
+// source: google/api/client.proto
+// Protobuf Java Version: 4.33.2
+
+package com.google.api;
+
+/**
+ *
+ *
+ * <pre>
+ * `BatchingConfigProto` defines the batching configuration for an API method.
+ * </pre>
+ *
+ * Protobuf type {@code google.api.BatchingConfigProto}
+ */
+@com.google.protobuf.Generated
+public final class BatchingConfigProto extends com.google.protobuf.GeneratedMessage
+    implements
+    // @@protoc_insertion_point(message_implements:google.api.BatchingConfigProto)
+    BatchingConfigProtoOrBuilder {
+  private static final long serialVersionUID = 0L;
+
+  static {
+    com.google.protobuf.RuntimeVersion.validateProtobufGencodeVersion(
+        com.google.protobuf.RuntimeVersion.RuntimeDomain.PUBLIC,
+        /* major= */ 4,
+        /* minor= */ 33,
+        /* patch= */ 2,
+        /* suffix= */ "",
+        "BatchingConfigProto");
+  }
+
+  // Use BatchingConfigProto.newBuilder() to construct.
+  private BatchingConfigProto(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+    super(builder);
+  }
+
+  private BatchingConfigProto() {}
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.api.ClientProto.internal_static_google_api_BatchingConfigProto_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.api.ClientProto
+        .internal_static_google_api_BatchingConfigProto_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.api.BatchingConfigProto.class,
+            com.google.api.BatchingConfigProto.Builder.class);
+  }
+
+  private int bitField0_;
+  public static final int THRESHOLDS_FIELD_NUMBER = 1;
+  private com.google.api.BatchingSettingsProto thresholds_;
+
+  /**
+   *
+   *
+   * <pre>
+   * The thresholds which trigger a batched request to be sent.
+   * </pre>
+   *
+   * <code>.google.api.BatchingSettingsProto thresholds = 1;</code>
+   *
+   * @return Whether the thresholds field is set.
+   */
+  @java.lang.Override
+  public boolean hasThresholds() {
+    return ((bitField0_ & 0x00000001) != 0);
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * The thresholds which trigger a batched request to be sent.
+   * </pre>
+   *
+   * <code>.google.api.BatchingSettingsProto thresholds = 1;</code>
+   *
+   * @return The thresholds.
+   */
+  @java.lang.Override
+  public com.google.api.BatchingSettingsProto getThresholds() {
+    return thresholds_ == null
+        ? com.google.api.BatchingSettingsProto.getDefaultInstance()
+        : thresholds_;
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * The thresholds which trigger a batched request to be sent.
+   * </pre>
+   *
+   * <code>.google.api.BatchingSettingsProto thresholds = 1;</code>
+   */
+  @java.lang.Override
+  public com.google.api.BatchingSettingsProtoOrBuilder getThresholdsOrBuilder() {
+    return thresholds_ == null
+        ? com.google.api.BatchingSettingsProto.getDefaultInstance()
+        : thresholds_;
+  }
+
+  public static final int BATCH_DESCRIPTOR_FIELD_NUMBER = 2;
+  private com.google.api.BatchingDescriptorProto batchDescriptor_;
+
+  /**
+   *
+   *
+   * <pre>
+   * The request and response fields used in batching.
+   * </pre>
+   *
+   * <code>.google.api.BatchingDescriptorProto batch_descriptor = 2;</code>
+   *
+   * @return Whether the batchDescriptor field is set.
+   */
+  @java.lang.Override
+  public boolean hasBatchDescriptor() {
+    return ((bitField0_ & 0x00000002) != 0);
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * The request and response fields used in batching.
+   * </pre>
+   *
+   * <code>.google.api.BatchingDescriptorProto batch_descriptor = 2;</code>
+   *
+   * @return The batchDescriptor.
+   */
+  @java.lang.Override
+  public com.google.api.BatchingDescriptorProto getBatchDescriptor() {
+    return batchDescriptor_ == null
+        ? com.google.api.BatchingDescriptorProto.getDefaultInstance()
+        : batchDescriptor_;
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * The request and response fields used in batching.
+   * </pre>
+   *
+   * <code>.google.api.BatchingDescriptorProto batch_descriptor = 2;</code>
+   */
+  @java.lang.Override
+  public com.google.api.BatchingDescriptorProtoOrBuilder getBatchDescriptorOrBuilder() {
+    return batchDescriptor_ == null
+        ? com.google.api.BatchingDescriptorProto.getDefaultInstance()
+        : batchDescriptor_;
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (((bitField0_ & 0x00000001) != 0)) {
+      output.writeMessage(1, getThresholds());
+    }
+    if (((bitField0_ & 0x00000002) != 0)) {
+      output.writeMessage(2, getBatchDescriptor());
+    }
+    getUnknownFields().writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (((bitField0_ & 0x00000001) != 0)) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, getThresholds());
+    }
+    if (((bitField0_ & 0x00000002) != 0)) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getBatchDescriptor());
+    }
+    size += getUnknownFields().getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.api.BatchingConfigProto)) {
+      return super.equals(obj);
+    }
+    com.google.api.BatchingConfigProto other = (com.google.api.BatchingConfigProto) obj;
+
+    if (hasThresholds() != other.hasThresholds()) return false;
+    if (hasThresholds()) {
+      if (!getThresholds().equals(other.getThresholds())) return false;
+    }
+    if (hasBatchDescriptor() != other.hasBatchDescriptor()) return false;
+    if (hasBatchDescriptor()) {
+      if (!getBatchDescriptor().equals(other.getBatchDescriptor())) return false;
+    }
+    if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    if (hasThresholds()) {
+      hash = (37 * hash) + THRESHOLDS_FIELD_NUMBER;
+      hash = (53 * hash) + getThresholds().hashCode();
+    }
+    if (hasBatchDescriptor()) {
+      hash = (37 * hash) + BATCH_DESCRIPTOR_FIELD_NUMBER;
+      hash = (53 * hash) + getBatchDescriptor().hashCode();
+    }
+    hash = (29 * hash) + getUnknownFields().hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.api.BatchingConfigProto parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.api.BatchingConfigProto parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.api.BatchingConfigProto parseFrom(com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.api.BatchingConfigProto parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.api.BatchingConfigProto parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.api.BatchingConfigProto parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.api.BatchingConfigProto parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.api.BatchingConfigProto parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.api.BatchingConfigProto parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.api.BatchingConfigProto parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.api.BatchingConfigProto parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.api.BatchingConfigProto parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.api.BatchingConfigProto prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * `BatchingConfigProto` defines the batching configuration for an API method.
+   * </pre>
+   *
+   * Protobuf type {@code google.api.BatchingConfigProto}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessage.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.api.BatchingConfigProto)
+      com.google.api.BatchingConfigProtoOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.api.ClientProto.internal_static_google_api_BatchingConfigProto_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.api.ClientProto
+          .internal_static_google_api_BatchingConfigProto_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.api.BatchingConfigProto.class,
+              com.google.api.BatchingConfigProto.Builder.class);
+    }
+
+    // Construct using com.google.api.BatchingConfigProto.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
+        internalGetThresholdsFieldBuilder();
+        internalGetBatchDescriptorFieldBuilder();
+      }
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      bitField0_ = 0;
+      thresholds_ = null;
+      if (thresholdsBuilder_ != null) {
+        thresholdsBuilder_.dispose();
+        thresholdsBuilder_ = null;
+      }
+      batchDescriptor_ = null;
+      if (batchDescriptorBuilder_ != null) {
+        batchDescriptorBuilder_.dispose();
+        batchDescriptorBuilder_ = null;
+      }
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.api.ClientProto.internal_static_google_api_BatchingConfigProto_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.api.BatchingConfigProto getDefaultInstanceForType() {
+      return com.google.api.BatchingConfigProto.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.api.BatchingConfigProto build() {
+      com.google.api.BatchingConfigProto result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.api.BatchingConfigProto buildPartial() {
+      com.google.api.BatchingConfigProto result = new com.google.api.BatchingConfigProto(this);
+      if (bitField0_ != 0) {
+        buildPartial0(result);
+      }
+      onBuilt();
+      return result;
+    }
+
+    private void buildPartial0(com.google.api.BatchingConfigProto result) {
+      int from_bitField0_ = bitField0_;
+      int to_bitField0_ = 0;
+      if (((from_bitField0_ & 0x00000001) != 0)) {
+        result.thresholds_ = thresholdsBuilder_ == null ? thresholds_ : thresholdsBuilder_.build();
+        to_bitField0_ |= 0x00000001;
+      }
+      if (((from_bitField0_ & 0x00000002) != 0)) {
+        result.batchDescriptor_ =
+            batchDescriptorBuilder_ == null ? batchDescriptor_ : batchDescriptorBuilder_.build();
+        to_bitField0_ |= 0x00000002;
+      }
+      result.bitField0_ |= to_bitField0_;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.api.BatchingConfigProto) {
+        return mergeFrom((com.google.api.BatchingConfigProto) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.api.BatchingConfigProto other) {
+      if (other == com.google.api.BatchingConfigProto.getDefaultInstance()) return this;
+      if (other.hasThresholds()) {
+        mergeThresholds(other.getThresholds());
+      }
+      if (other.hasBatchDescriptor()) {
+        mergeBatchDescriptor(other.getBatchDescriptor());
+      }
+      this.mergeUnknownFields(other.getUnknownFields());
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      if (extensionRegistry == null) {
+        throw new java.lang.NullPointerException();
+      }
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            case 10:
+              {
+                input.readMessage(
+                    internalGetThresholdsFieldBuilder().getBuilder(), extensionRegistry);
+                bitField0_ |= 0x00000001;
+                break;
+              } // case 10
+            case 18:
+              {
+                input.readMessage(
+                    internalGetBatchDescriptorFieldBuilder().getBuilder(), extensionRegistry);
+                bitField0_ |= 0x00000002;
+                break;
+              } // case 18
+            default:
+              {
+                if (!super.parseUnknownField(input, extensionRegistry, tag)) {
+                  done = true; // was an endgroup tag
+                }
+                break;
+              } // default:
+          } // switch (tag)
+        } // while (!done)
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.unwrapIOException();
+      } finally {
+        onChanged();
+      } // finally
+      return this;
+    }
+
+    private int bitField0_;
+
+    private com.google.api.BatchingSettingsProto thresholds_;
+    private com.google.protobuf.SingleFieldBuilder<
+            com.google.api.BatchingSettingsProto,
+            com.google.api.BatchingSettingsProto.Builder,
+            com.google.api.BatchingSettingsProtoOrBuilder>
+        thresholdsBuilder_;
+
+    /**
+     *
+     *
+     * <pre>
+     * The thresholds which trigger a batched request to be sent.
+     * </pre>
+     *
+     * <code>.google.api.BatchingSettingsProto thresholds = 1;</code>
+     *
+     * @return Whether the thresholds field is set.
+     */
+    public boolean hasThresholds() {
+      return ((bitField0_ & 0x00000001) != 0);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The thresholds which trigger a batched request to be sent.
+     * </pre>
+     *
+     * <code>.google.api.BatchingSettingsProto thresholds = 1;</code>
+     *
+     * @return The thresholds.
+     */
+    public com.google.api.BatchingSettingsProto getThresholds() {
+      if (thresholdsBuilder_ == null) {
+        return thresholds_ == null
+            ? com.google.api.BatchingSettingsProto.getDefaultInstance()
+            : thresholds_;
+      } else {
+        return thresholdsBuilder_.getMessage();
+      }
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The thresholds which trigger a batched request to be sent.
+     * </pre>
+     *
+     * <code>.google.api.BatchingSettingsProto thresholds = 1;</code>
+     */
+    public Builder setThresholds(com.google.api.BatchingSettingsProto value) {
+      if (thresholdsBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        thresholds_ = value;
+      } else {
+        thresholdsBuilder_.setMessage(value);
+      }
+      bitField0_ |= 0x00000001;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The thresholds which trigger a batched request to be sent.
+     * </pre>
+     *
+     * <code>.google.api.BatchingSettingsProto thresholds = 1;</code>
+     */
+    public Builder setThresholds(com.google.api.BatchingSettingsProto.Builder builderForValue) {
+      if (thresholdsBuilder_ == null) {
+        thresholds_ = builderForValue.build();
+      } else {
+        thresholdsBuilder_.setMessage(builderForValue.build());
+      }
+      bitField0_ |= 0x00000001;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The thresholds which trigger a batched request to be sent.
+     * </pre>
+     *
+     * <code>.google.api.BatchingSettingsProto thresholds = 1;</code>
+     */
+    public Builder mergeThresholds(com.google.api.BatchingSettingsProto value) {
+      if (thresholdsBuilder_ == null) {
+        if (((bitField0_ & 0x00000001) != 0)
+            && thresholds_ != null
+            && thresholds_ != com.google.api.BatchingSettingsProto.getDefaultInstance()) {
+          getThresholdsBuilder().mergeFrom(value);
+        } else {
+          thresholds_ = value;
+        }
+      } else {
+        thresholdsBuilder_.mergeFrom(value);
+      }
+      if (thresholds_ != null) {
+        bitField0_ |= 0x00000001;
+        onChanged();
+      }
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The thresholds which trigger a batched request to be sent.
+     * </pre>
+     *
+     * <code>.google.api.BatchingSettingsProto thresholds = 1;</code>
+     */
+    public Builder clearThresholds() {
+      bitField0_ = (bitField0_ & ~0x00000001);
+      thresholds_ = null;
+      if (thresholdsBuilder_ != null) {
+        thresholdsBuilder_.dispose();
+        thresholdsBuilder_ = null;
+      }
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The thresholds which trigger a batched request to be sent.
+     * </pre>
+     *
+     * <code>.google.api.BatchingSettingsProto thresholds = 1;</code>
+     */
+    public com.google.api.BatchingSettingsProto.Builder getThresholdsBuilder() {
+      bitField0_ |= 0x00000001;
+      onChanged();
+      return internalGetThresholdsFieldBuilder().getBuilder();
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The thresholds which trigger a batched request to be sent.
+     * </pre>
+     *
+     * <code>.google.api.BatchingSettingsProto thresholds = 1;</code>
+     */
+    public com.google.api.BatchingSettingsProtoOrBuilder getThresholdsOrBuilder() {
+      if (thresholdsBuilder_ != null) {
+        return thresholdsBuilder_.getMessageOrBuilder();
+      } else {
+        return thresholds_ == null
+            ? com.google.api.BatchingSettingsProto.getDefaultInstance()
+            : thresholds_;
+      }
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The thresholds which trigger a batched request to be sent.
+     * </pre>
+     *
+     * <code>.google.api.BatchingSettingsProto thresholds = 1;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilder<
+            com.google.api.BatchingSettingsProto,
+            com.google.api.BatchingSettingsProto.Builder,
+            com.google.api.BatchingSettingsProtoOrBuilder>
+        internalGetThresholdsFieldBuilder() {
+      if (thresholdsBuilder_ == null) {
+        thresholdsBuilder_ =
+            new com.google.protobuf.SingleFieldBuilder<
+                com.google.api.BatchingSettingsProto,
+                com.google.api.BatchingSettingsProto.Builder,
+                com.google.api.BatchingSettingsProtoOrBuilder>(
+                getThresholds(), getParentForChildren(), isClean());
+        thresholds_ = null;
+      }
+      return thresholdsBuilder_;
+    }
+
+    private com.google.api.BatchingDescriptorProto batchDescriptor_;
+    private com.google.protobuf.SingleFieldBuilder<
+            com.google.api.BatchingDescriptorProto,
+            com.google.api.BatchingDescriptorProto.Builder,
+            com.google.api.BatchingDescriptorProtoOrBuilder>
+        batchDescriptorBuilder_;
+
+    /**
+     *
+     *
+     * <pre>
+     * The request and response fields used in batching.
+     * </pre>
+     *
+     * <code>.google.api.BatchingDescriptorProto batch_descriptor = 2;</code>
+     *
+     * @return Whether the batchDescriptor field is set.
+     */
+    public boolean hasBatchDescriptor() {
+      return ((bitField0_ & 0x00000002) != 0);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The request and response fields used in batching.
+     * </pre>
+     *
+     * <code>.google.api.BatchingDescriptorProto batch_descriptor = 2;</code>
+     *
+     * @return The batchDescriptor.
+     */
+    public com.google.api.BatchingDescriptorProto getBatchDescriptor() {
+      if (batchDescriptorBuilder_ == null) {
+        return batchDescriptor_ == null
+            ? com.google.api.BatchingDescriptorProto.getDefaultInstance()
+            : batchDescriptor_;
+      } else {
+        return batchDescriptorBuilder_.getMessage();
+      }
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The request and response fields used in batching.
+     * </pre>
+     *
+     * <code>.google.api.BatchingDescriptorProto batch_descriptor = 2;</code>
+     */
+    public Builder setBatchDescriptor(com.google.api.BatchingDescriptorProto value) {
+      if (batchDescriptorBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        batchDescriptor_ = value;
+      } else {
+        batchDescriptorBuilder_.setMessage(value);
+      }
+      bitField0_ |= 0x00000002;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The request and response fields used in batching.
+     * </pre>
+     *
+     * <code>.google.api.BatchingDescriptorProto batch_descriptor = 2;</code>
+     */
+    public Builder setBatchDescriptor(
+        com.google.api.BatchingDescriptorProto.Builder builderForValue) {
+      if (batchDescriptorBuilder_ == null) {
+        batchDescriptor_ = builderForValue.build();
+      } else {
+        batchDescriptorBuilder_.setMessage(builderForValue.build());
+      }
+      bitField0_ |= 0x00000002;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The request and response fields used in batching.
+     * </pre>
+     *
+     * <code>.google.api.BatchingDescriptorProto batch_descriptor = 2;</code>
+     */
+    public Builder mergeBatchDescriptor(com.google.api.BatchingDescriptorProto value) {
+      if (batchDescriptorBuilder_ == null) {
+        if (((bitField0_ & 0x00000002) != 0)
+            && batchDescriptor_ != null
+            && batchDescriptor_ != com.google.api.BatchingDescriptorProto.getDefaultInstance()) {
+          getBatchDescriptorBuilder().mergeFrom(value);
+        } else {
+          batchDescriptor_ = value;
+        }
+      } else {
+        batchDescriptorBuilder_.mergeFrom(value);
+      }
+      if (batchDescriptor_ != null) {
+        bitField0_ |= 0x00000002;
+        onChanged();
+      }
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The request and response fields used in batching.
+     * </pre>
+     *
+     * <code>.google.api.BatchingDescriptorProto batch_descriptor = 2;</code>
+     */
+    public Builder clearBatchDescriptor() {
+      bitField0_ = (bitField0_ & ~0x00000002);
+      batchDescriptor_ = null;
+      if (batchDescriptorBuilder_ != null) {
+        batchDescriptorBuilder_.dispose();
+        batchDescriptorBuilder_ = null;
+      }
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The request and response fields used in batching.
+     * </pre>
+     *
+     * <code>.google.api.BatchingDescriptorProto batch_descriptor = 2;</code>
+     */
+    public com.google.api.BatchingDescriptorProto.Builder getBatchDescriptorBuilder() {
+      bitField0_ |= 0x00000002;
+      onChanged();
+      return internalGetBatchDescriptorFieldBuilder().getBuilder();
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The request and response fields used in batching.
+     * </pre>
+     *
+     * <code>.google.api.BatchingDescriptorProto batch_descriptor = 2;</code>
+     */
+    public com.google.api.BatchingDescriptorProtoOrBuilder getBatchDescriptorOrBuilder() {
+      if (batchDescriptorBuilder_ != null) {
+        return batchDescriptorBuilder_.getMessageOrBuilder();
+      } else {
+        return batchDescriptor_ == null
+            ? com.google.api.BatchingDescriptorProto.getDefaultInstance()
+            : batchDescriptor_;
+      }
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The request and response fields used in batching.
+     * </pre>
+     *
+     * <code>.google.api.BatchingDescriptorProto batch_descriptor = 2;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilder<
+            com.google.api.BatchingDescriptorProto,
+            com.google.api.BatchingDescriptorProto.Builder,
+            com.google.api.BatchingDescriptorProtoOrBuilder>
+        internalGetBatchDescriptorFieldBuilder() {
+      if (batchDescriptorBuilder_ == null) {
+        batchDescriptorBuilder_ =
+            new com.google.protobuf.SingleFieldBuilder<
+                com.google.api.BatchingDescriptorProto,
+                com.google.api.BatchingDescriptorProto.Builder,
+                com.google.api.BatchingDescriptorProtoOrBuilder>(
+                getBatchDescriptor(), getParentForChildren(), isClean());
+        batchDescriptor_ = null;
+      }
+      return batchDescriptorBuilder_;
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.api.BatchingConfigProto)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.api.BatchingConfigProto)
+  private static final com.google.api.BatchingConfigProto DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.api.BatchingConfigProto();
+  }
+
+  public static com.google.api.BatchingConfigProto getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<BatchingConfigProto> PARSER =
+      new com.google.protobuf.AbstractParser<BatchingConfigProto>() {
+        @java.lang.Override
+        public BatchingConfigProto parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          Builder builder = newBuilder();
+          try {
+            builder.mergeFrom(input, extensionRegistry);
+          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+            throw e.setUnfinishedMessage(builder.buildPartial());
+          } catch (com.google.protobuf.UninitializedMessageException e) {
+            throw e.asInvalidProtocolBufferException().setUnfinishedMessage(builder.buildPartial());
+          } catch (java.io.IOException e) {
+            throw new com.google.protobuf.InvalidProtocolBufferException(e)
+                .setUnfinishedMessage(builder.buildPartial());
+          }
+          return builder.buildPartial();
+        }
+      };
+
+  public static com.google.protobuf.Parser<BatchingConfigProto> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<BatchingConfigProto> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.api.BatchingConfigProto getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BatchingConfigProtoOrBuilder.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BatchingConfigProtoOrBuilder.java
new file mode 100644
index 0000000000..c8a1323650
--- /dev/null
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BatchingConfigProtoOrBuilder.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// NO CHECKED-IN PROTOBUF GENCODE
+// source: google/api/client.proto
+// Protobuf Java Version: 4.33.2
+
+package com.google.api;
+
+@com.google.protobuf.Generated
+public interface BatchingConfigProtoOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.api.BatchingConfigProto)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * The thresholds which trigger a batched request to be sent.
+   * </pre>
+   *
+   * <code>.google.api.BatchingSettingsProto thresholds = 1;</code>
+   *
+   * @return Whether the thresholds field is set.
+   */
+  boolean hasThresholds();
+
+  /**
+   *
+   *
+   * <pre>
+   * The thresholds which trigger a batched request to be sent.
+   * </pre>
+   *
+   * <code>.google.api.BatchingSettingsProto thresholds = 1;</code>
+   *
+   * @return The thresholds.
+   */
+  com.google.api.BatchingSettingsProto getThresholds();
+
+  /**
+   *
+   *
+   * <pre>
+   * The thresholds which trigger a batched request to be sent.
+   * </pre>
+   *
+   * <code>.google.api.BatchingSettingsProto thresholds = 1;</code>
+   */
+  com.google.api.BatchingSettingsProtoOrBuilder getThresholdsOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * The request and response fields used in batching.
+   * </pre>
+   *
+   * <code>.google.api.BatchingDescriptorProto batch_descriptor = 2;</code>
+   *
+   * @return Whether the batchDescriptor field is set.
+   */
+  boolean hasBatchDescriptor();
+
+  /**
+   *
+   *
+   * <pre>
+   * The request and response fields used in batching.
+   * </pre>
+   *
+   * <code>.google.api.BatchingDescriptorProto batch_descriptor = 2;</code>
+   *
+   * @return The batchDescriptor.
+   */
+  com.google.api.BatchingDescriptorProto getBatchDescriptor();
+
+  /**
+   *
+   *
+   * <pre>
+   * The request and response fields used in batching.
+   * </pre>
+   *
+   * <code>.google.api.BatchingDescriptorProto batch_descriptor = 2;</code>
+   */
+  com.google.api.BatchingDescriptorProtoOrBuilder getBatchDescriptorOrBuilder();
+}
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BatchingDescriptorProto.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BatchingDescriptorProto.java
new file mode 100644
index 0000000000..103fc198ef
--- /dev/null
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BatchingDescriptorProto.java
@@ -0,0 +1,1123 @@
+/*
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// NO CHECKED-IN PROTOBUF GENCODE
+// source: google/api/client.proto
+// Protobuf Java Version: 4.33.2
+
+package com.google.api;
+
+/**
+ *
+ *
+ * <pre>
+ * `BatchingDescriptorProto` specifies the fields of the request message to be
+ * used for batching, and, optionally, the fields of the response message to be
+ * used for demultiplexing.
+ * </pre>
+ *
+ * Protobuf type {@code google.api.BatchingDescriptorProto}
+ */
+@com.google.protobuf.Generated
+public final class BatchingDescriptorProto extends com.google.protobuf.GeneratedMessage
+    implements
+    // @@protoc_insertion_point(message_implements:google.api.BatchingDescriptorProto)
+    BatchingDescriptorProtoOrBuilder {
+  private static final long serialVersionUID = 0L;
+
+  static {
+    com.google.protobuf.RuntimeVersion.validateProtobufGencodeVersion(
+        com.google.protobuf.RuntimeVersion.RuntimeDomain.PUBLIC,
+        /* major= */ 4,
+        /* minor= */ 33,
+        /* patch= */ 2,
+        /* suffix= */ "",
+        "BatchingDescriptorProto");
+  }
+
+  // Use BatchingDescriptorProto.newBuilder() to construct.
+  private BatchingDescriptorProto(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+    super(builder);
+  }
+
+  private BatchingDescriptorProto() {
+    batchedField_ = "";
+    discriminatorFields_ = com.google.protobuf.LazyStringArrayList.emptyList();
+    subresponseField_ = "";
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.api.ClientProto.internal_static_google_api_BatchingDescriptorProto_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.api.ClientProto
+        .internal_static_google_api_BatchingDescriptorProto_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.api.BatchingDescriptorProto.class,
+            com.google.api.BatchingDescriptorProto.Builder.class);
+  }
+
+  public static final int BATCHED_FIELD_FIELD_NUMBER = 1;
+
+  @SuppressWarnings("serial")
+  private volatile java.lang.Object batchedField_ = "";
+
+  /**
+   *
+   *
+   * <pre>
+   * The repeated field in the request message to be aggregated by batching.
+   * </pre>
+   *
+   * <code>string batched_field = 1;</code>
+   *
+   * @return The batchedField.
+   */
+  @java.lang.Override
+  public java.lang.String getBatchedField() {
+    java.lang.Object ref = batchedField_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      batchedField_ = s;
+      return s;
+    }
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * The repeated field in the request message to be aggregated by batching.
+   * </pre>
+   *
+   * <code>string batched_field = 1;</code>
+   *
+   * @return The bytes for batchedField.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getBatchedFieldBytes() {
+    java.lang.Object ref = batchedField_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
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+      batchedField_ = b;
+      return b;
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+
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+
+  @SuppressWarnings("serial")
+  private com.google.protobuf.LazyStringArrayList discriminatorFields_ =
+      com.google.protobuf.LazyStringArrayList.emptyList();
+
+  /**
+   *
+   *
+   * <pre>
+   * A list of the fields in the request message. Two requests will be batched
+   * together only if the values of every field specified in
+   * `request_discriminator_fields` is equal between the two requests.
+   * </pre>
+   *
+   * <code>repeated string discriminator_fields = 2;</code>
+   *
+   * @return A list containing the discriminatorFields.
+   */
+  public com.google.protobuf.ProtocolStringList getDiscriminatorFieldsList() {
+    return discriminatorFields_;
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * A list of the fields in the request message. Two requests will be batched
+   * together only if the values of every field specified in
+   * `request_discriminator_fields` is equal between the two requests.
+   * </pre>
+   *
+   * <code>repeated string discriminator_fields = 2;</code>
+   *
+   * @return The count of discriminatorFields.
+   */
+  public int getDiscriminatorFieldsCount() {
+    return discriminatorFields_.size();
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * A list of the fields in the request message. Two requests will be batched
+   * together only if the values of every field specified in
+   * `request_discriminator_fields` is equal between the two requests.
+   * </pre>
+   *
+   * <code>repeated string discriminator_fields = 2;</code>
+   *
+   * @param index The index of the element to return.
+   * @return The discriminatorFields at the given index.
+   */
+  public java.lang.String getDiscriminatorFields(int index) {
+    return discriminatorFields_.get(index);
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * A list of the fields in the request message. Two requests will be batched
+   * together only if the values of every field specified in
+   * `request_discriminator_fields` is equal between the two requests.
+   * </pre>
+   *
+   * <code>repeated string discriminator_fields = 2;</code>
+   *
+   * @param index The index of the value to return.
+   * @return The bytes of the discriminatorFields at the given index.
+   */
+  public com.google.protobuf.ByteString getDiscriminatorFieldsBytes(int index) {
+    return discriminatorFields_.getByteString(index);
+  }
+
+  public static final int SUBRESPONSE_FIELD_FIELD_NUMBER = 3;
+
+  @SuppressWarnings("serial")
+  private volatile java.lang.Object subresponseField_ = "";
+
+  /**
+   *
+   *
+   * <pre>
+   * Optional. When present, indicates the field in the response message to be
+   * used to demultiplex the response into multiple response messages, in
+   * correspondence with the multiple request messages originally batched
+   * together.
+   * </pre>
+   *
+   * <code>string subresponse_field = 3;</code>
+   *
+   * @return The subresponseField.
+   */
+  @java.lang.Override
+  public java.lang.String getSubresponseField() {
+    java.lang.Object ref = subresponseField_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      subresponseField_ = s;
+      return s;
+    }
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * Optional. When present, indicates the field in the response message to be
+   * used to demultiplex the response into multiple response messages, in
+   * correspondence with the multiple request messages originally batched
+   * together.
+   * </pre>
+   *
+   * <code>string subresponse_field = 3;</code>
+   *
+   * @return The bytes for subresponseField.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getSubresponseFieldBytes() {
+    java.lang.Object ref = subresponseField_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      subresponseField_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (!com.google.protobuf.GeneratedMessage.isStringEmpty(batchedField_)) {
+      com.google.protobuf.GeneratedMessage.writeString(output, 1, batchedField_);
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+    for (int i = 0; i < discriminatorFields_.size(); i++) {
+      com.google.protobuf.GeneratedMessage.writeString(output, 2, discriminatorFields_.getRaw(i));
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+    if (!com.google.protobuf.GeneratedMessage.isStringEmpty(subresponseField_)) {
+      com.google.protobuf.GeneratedMessage.writeString(output, 3, subresponseField_);
+    }
+    getUnknownFields().writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (!com.google.protobuf.GeneratedMessage.isStringEmpty(batchedField_)) {
+      size += com.google.protobuf.GeneratedMessage.computeStringSize(1, batchedField_);
+    }
+    {
+      int dataSize = 0;
+      for (int i = 0; i < discriminatorFields_.size(); i++) {
+        dataSize += computeStringSizeNoTag(discriminatorFields_.getRaw(i));
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+      size += dataSize;
+      size += 1 * getDiscriminatorFieldsList().size();
+    }
+    if (!com.google.protobuf.GeneratedMessage.isStringEmpty(subresponseField_)) {
+      size += com.google.protobuf.GeneratedMessage.computeStringSize(3, subresponseField_);
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+    size += getUnknownFields().getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.api.BatchingDescriptorProto)) {
+      return super.equals(obj);
+    }
+    com.google.api.BatchingDescriptorProto other = (com.google.api.BatchingDescriptorProto) obj;
+
+    if (!getBatchedField().equals(other.getBatchedField())) return false;
+    if (!getDiscriminatorFieldsList().equals(other.getDiscriminatorFieldsList())) return false;
+    if (!getSubresponseField().equals(other.getSubresponseField())) return false;
+    if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + BATCHED_FIELD_FIELD_NUMBER;
+    hash = (53 * hash) + getBatchedField().hashCode();
+    if (getDiscriminatorFieldsCount() > 0) {
+      hash = (37 * hash) + DISCRIMINATOR_FIELDS_FIELD_NUMBER;
+      hash = (53 * hash) + getDiscriminatorFieldsList().hashCode();
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+    hash = (37 * hash) + SUBRESPONSE_FIELD_FIELD_NUMBER;
+    hash = (53 * hash) + getSubresponseField().hashCode();
+    hash = (29 * hash) + getUnknownFields().hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.api.BatchingDescriptorProto parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.api.BatchingDescriptorProto parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.api.BatchingDescriptorProto parseFrom(
+      com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.api.BatchingDescriptorProto parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.api.BatchingDescriptorProto parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.api.BatchingDescriptorProto parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.api.BatchingDescriptorProto parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.api.BatchingDescriptorProto parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.api.BatchingDescriptorProto parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.api.BatchingDescriptorProto parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage.parseDelimitedWithIOException(
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+  }
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+  public static com.google.api.BatchingDescriptorProto parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.api.BatchingDescriptorProto parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
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+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
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+  public static Builder newBuilder(com.google.api.BatchingDescriptorProto prototype) {
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+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessage.BuilderParent parent) {
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+    return builder;
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * `BatchingDescriptorProto` specifies the fields of the request message to be
+   * used for batching, and, optionally, the fields of the response message to be
+   * used for demultiplexing.
+   * </pre>
+   *
+   * Protobuf type {@code google.api.BatchingDescriptorProto}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessage.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.api.BatchingDescriptorProto)
+      com.google.api.BatchingDescriptorProtoOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.api.ClientProto
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+    }
+
+    @java.lang.Override
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+    // Construct using com.google.api.BatchingDescriptorProto.newBuilder()
+    private Builder() {}
+
+    private Builder(com.google.protobuf.GeneratedMessage.BuilderParent parent) {
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+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      bitField0_ = 0;
+      batchedField_ = "";
+      discriminatorFields_ = com.google.protobuf.LazyStringArrayList.emptyList();
+      subresponseField_ = "";
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.api.ClientProto
+          .internal_static_google_api_BatchingDescriptorProto_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.api.BatchingDescriptorProto getDefaultInstanceForType() {
+      return com.google.api.BatchingDescriptorProto.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.api.BatchingDescriptorProto build() {
+      com.google.api.BatchingDescriptorProto result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.api.BatchingDescriptorProto buildPartial() {
+      com.google.api.BatchingDescriptorProto result =
+          new com.google.api.BatchingDescriptorProto(this);
+      if (bitField0_ != 0) {
+        buildPartial0(result);
+      }
+      onBuilt();
+      return result;
+    }
+
+    private void buildPartial0(com.google.api.BatchingDescriptorProto result) {
+      int from_bitField0_ = bitField0_;
+      if (((from_bitField0_ & 0x00000001) != 0)) {
+        result.batchedField_ = batchedField_;
+      }
+      if (((from_bitField0_ & 0x00000002) != 0)) {
+        discriminatorFields_.makeImmutable();
+        result.discriminatorFields_ = discriminatorFields_;
+      }
+      if (((from_bitField0_ & 0x00000004) != 0)) {
+        result.subresponseField_ = subresponseField_;
+      }
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.api.BatchingDescriptorProto) {
+        return mergeFrom((com.google.api.BatchingDescriptorProto) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.api.BatchingDescriptorProto other) {
+      if (other == com.google.api.BatchingDescriptorProto.getDefaultInstance()) return this;
+      if (!other.getBatchedField().isEmpty()) {
+        batchedField_ = other.batchedField_;
+        bitField0_ |= 0x00000001;
+        onChanged();
+      }
+      if (!other.discriminatorFields_.isEmpty()) {
+        if (discriminatorFields_.isEmpty()) {
+          discriminatorFields_ = other.discriminatorFields_;
+          bitField0_ |= 0x00000002;
+        } else {
+          ensureDiscriminatorFieldsIsMutable();
+          discriminatorFields_.addAll(other.discriminatorFields_);
+        }
+        onChanged();
+      }
+      if (!other.getSubresponseField().isEmpty()) {
+        subresponseField_ = other.subresponseField_;
+        bitField0_ |= 0x00000004;
+        onChanged();
+      }
+      this.mergeUnknownFields(other.getUnknownFields());
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      if (extensionRegistry == null) {
+        throw new java.lang.NullPointerException();
+      }
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            case 10:
+              {
+                batchedField_ = input.readStringRequireUtf8();
+                bitField0_ |= 0x00000001;
+                break;
+              } // case 10
+            case 18:
+              {
+                java.lang.String s = input.readStringRequireUtf8();
+                ensureDiscriminatorFieldsIsMutable();
+                discriminatorFields_.add(s);
+                break;
+              } // case 18
+            case 26:
+              {
+                subresponseField_ = input.readStringRequireUtf8();
+                bitField0_ |= 0x00000004;
+                break;
+              } // case 26
+            default:
+              {
+                if (!super.parseUnknownField(input, extensionRegistry, tag)) {
+                  done = true; // was an endgroup tag
+                }
+                break;
+              } // default:
+          } // switch (tag)
+        } // while (!done)
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.unwrapIOException();
+      } finally {
+        onChanged();
+      } // finally
+      return this;
+    }
+
+    private int bitField0_;
+
+    private java.lang.Object batchedField_ = "";
+
+    /**
+     *
+     *
+     * <pre>
+     * The repeated field in the request message to be aggregated by batching.
+     * </pre>
+     *
+     * <code>string batched_field = 1;</code>
+     *
+     * @return The batchedField.
+     */
+    public java.lang.String getBatchedField() {
+      java.lang.Object ref = batchedField_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        batchedField_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The repeated field in the request message to be aggregated by batching.
+     * </pre>
+     *
+     * <code>string batched_field = 1;</code>
+     *
+     * @return The bytes for batchedField.
+     */
+    public com.google.protobuf.ByteString getBatchedFieldBytes() {
+      java.lang.Object ref = batchedField_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        batchedField_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The repeated field in the request message to be aggregated by batching.
+     * </pre>
+     *
+     * <code>string batched_field = 1;</code>
+     *
+     * @param value The batchedField to set.
+     * @return This builder for chaining.
+     */
+    public Builder setBatchedField(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      batchedField_ = value;
+      bitField0_ |= 0x00000001;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The repeated field in the request message to be aggregated by batching.
+     * </pre>
+     *
+     * <code>string batched_field = 1;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearBatchedField() {
+      batchedField_ = getDefaultInstance().getBatchedField();
+      bitField0_ = (bitField0_ & ~0x00000001);
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The repeated field in the request message to be aggregated by batching.
+     * </pre>
+     *
+     * <code>string batched_field = 1;</code>
+     *
+     * @param value The bytes for batchedField to set.
+     * @return This builder for chaining.
+     */
+    public Builder setBatchedFieldBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+      batchedField_ = value;
+      bitField0_ |= 0x00000001;
+      onChanged();
+      return this;
+    }
+
+    private com.google.protobuf.LazyStringArrayList discriminatorFields_ =
+        com.google.protobuf.LazyStringArrayList.emptyList();
+
+    private void ensureDiscriminatorFieldsIsMutable() {
+      if (!discriminatorFields_.isModifiable()) {
+        discriminatorFields_ = new com.google.protobuf.LazyStringArrayList(discriminatorFields_);
+      }
+      bitField0_ |= 0x00000002;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * A list of the fields in the request message. Two requests will be batched
+     * together only if the values of every field specified in
+     * `request_discriminator_fields` is equal between the two requests.
+     * </pre>
+     *
+     * <code>repeated string discriminator_fields = 2;</code>
+     *
+     * @return A list containing the discriminatorFields.
+     */
+    public com.google.protobuf.ProtocolStringList getDiscriminatorFieldsList() {
+      discriminatorFields_.makeImmutable();
+      return discriminatorFields_;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * A list of the fields in the request message. Two requests will be batched
+     * together only if the values of every field specified in
+     * `request_discriminator_fields` is equal between the two requests.
+     * </pre>
+     *
+     * <code>repeated string discriminator_fields = 2;</code>
+     *
+     * @return The count of discriminatorFields.
+     */
+    public int getDiscriminatorFieldsCount() {
+      return discriminatorFields_.size();
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * A list of the fields in the request message. Two requests will be batched
+     * together only if the values of every field specified in
+     * `request_discriminator_fields` is equal between the two requests.
+     * </pre>
+     *
+     * <code>repeated string discriminator_fields = 2;</code>
+     *
+     * @param index The index of the element to return.
+     * @return The discriminatorFields at the given index.
+     */
+    public java.lang.String getDiscriminatorFields(int index) {
+      return discriminatorFields_.get(index);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * A list of the fields in the request message. Two requests will be batched
+     * together only if the values of every field specified in
+     * `request_discriminator_fields` is equal between the two requests.
+     * </pre>
+     *
+     * <code>repeated string discriminator_fields = 2;</code>
+     *
+     * @param index The index of the value to return.
+     * @return The bytes of the discriminatorFields at the given index.
+     */
+    public com.google.protobuf.ByteString getDiscriminatorFieldsBytes(int index) {
+      return discriminatorFields_.getByteString(index);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * A list of the fields in the request message. Two requests will be batched
+     * together only if the values of every field specified in
+     * `request_discriminator_fields` is equal between the two requests.
+     * </pre>
+     *
+     * <code>repeated string discriminator_fields = 2;</code>
+     *
+     * @param index The index to set the value at.
+     * @param value The discriminatorFields to set.
+     * @return This builder for chaining.
+     */
+    public Builder setDiscriminatorFields(int index, java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensureDiscriminatorFieldsIsMutable();
+      discriminatorFields_.set(index, value);
+      bitField0_ |= 0x00000002;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * A list of the fields in the request message. Two requests will be batched
+     * together only if the values of every field specified in
+     * `request_discriminator_fields` is equal between the two requests.
+     * </pre>
+     *
+     * <code>repeated string discriminator_fields = 2;</code>
+     *
+     * @param value The discriminatorFields to add.
+     * @return This builder for chaining.
+     */
+    public Builder addDiscriminatorFields(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      ensureDiscriminatorFieldsIsMutable();
+      discriminatorFields_.add(value);
+      bitField0_ |= 0x00000002;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * A list of the fields in the request message. Two requests will be batched
+     * together only if the values of every field specified in
+     * `request_discriminator_fields` is equal between the two requests.
+     * </pre>
+     *
+     * <code>repeated string discriminator_fields = 2;</code>
+     *
+     * @param values The discriminatorFields to add.
+     * @return This builder for chaining.
+     */
+    public Builder addAllDiscriminatorFields(java.lang.Iterable<java.lang.String> values) {
+      ensureDiscriminatorFieldsIsMutable();
+      com.google.protobuf.AbstractMessageLite.Builder.addAll(values, discriminatorFields_);
+      bitField0_ |= 0x00000002;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * A list of the fields in the request message. Two requests will be batched
+     * together only if the values of every field specified in
+     * `request_discriminator_fields` is equal between the two requests.
+     * </pre>
+     *
+     * <code>repeated string discriminator_fields = 2;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearDiscriminatorFields() {
+      discriminatorFields_ = com.google.protobuf.LazyStringArrayList.emptyList();
+      bitField0_ = (bitField0_ & ~0x00000002);
+      ;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * A list of the fields in the request message. Two requests will be batched
+     * together only if the values of every field specified in
+     * `request_discriminator_fields` is equal between the two requests.
+     * </pre>
+     *
+     * <code>repeated string discriminator_fields = 2;</code>
+     *
+     * @param value The bytes of the discriminatorFields to add.
+     * @return This builder for chaining.
+     */
+    public Builder addDiscriminatorFieldsBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+      ensureDiscriminatorFieldsIsMutable();
+      discriminatorFields_.add(value);
+      bitField0_ |= 0x00000002;
+      onChanged();
+      return this;
+    }
+
+    private java.lang.Object subresponseField_ = "";
+
+    /**
+     *
+     *
+     * <pre>
+     * Optional. When present, indicates the field in the response message to be
+     * used to demultiplex the response into multiple response messages, in
+     * correspondence with the multiple request messages originally batched
+     * together.
+     * </pre>
+     *
+     * <code>string subresponse_field = 3;</code>
+     *
+     * @return The subresponseField.
+     */
+    public java.lang.String getSubresponseField() {
+      java.lang.Object ref = subresponseField_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        subresponseField_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Optional. When present, indicates the field in the response message to be
+     * used to demultiplex the response into multiple response messages, in
+     * correspondence with the multiple request messages originally batched
+     * together.
+     * </pre>
+     *
+     * <code>string subresponse_field = 3;</code>
+     *
+     * @return The bytes for subresponseField.
+     */
+    public com.google.protobuf.ByteString getSubresponseFieldBytes() {
+      java.lang.Object ref = subresponseField_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        subresponseField_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Optional. When present, indicates the field in the response message to be
+     * used to demultiplex the response into multiple response messages, in
+     * correspondence with the multiple request messages originally batched
+     * together.
+     * </pre>
+     *
+     * <code>string subresponse_field = 3;</code>
+     *
+     * @param value The subresponseField to set.
+     * @return This builder for chaining.
+     */
+    public Builder setSubresponseField(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      subresponseField_ = value;
+      bitField0_ |= 0x00000004;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Optional. When present, indicates the field in the response message to be
+     * used to demultiplex the response into multiple response messages, in
+     * correspondence with the multiple request messages originally batched
+     * together.
+     * </pre>
+     *
+     * <code>string subresponse_field = 3;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearSubresponseField() {
+      subresponseField_ = getDefaultInstance().getSubresponseField();
+      bitField0_ = (bitField0_ & ~0x00000004);
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Optional. When present, indicates the field in the response message to be
+     * used to demultiplex the response into multiple response messages, in
+     * correspondence with the multiple request messages originally batched
+     * together.
+     * </pre>
+     *
+     * <code>string subresponse_field = 3;</code>
+     *
+     * @param value The bytes for subresponseField to set.
+     * @return This builder for chaining.
+     */
+    public Builder setSubresponseFieldBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+      subresponseField_ = value;
+      bitField0_ |= 0x00000004;
+      onChanged();
+      return this;
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.api.BatchingDescriptorProto)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.api.BatchingDescriptorProto)
+  private static final com.google.api.BatchingDescriptorProto DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.api.BatchingDescriptorProto();
+  }
+
+  public static com.google.api.BatchingDescriptorProto getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<BatchingDescriptorProto> PARSER =
+      new com.google.protobuf.AbstractParser<BatchingDescriptorProto>() {
+        @java.lang.Override
+        public BatchingDescriptorProto parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          Builder builder = newBuilder();
+          try {
+            builder.mergeFrom(input, extensionRegistry);
+          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+            throw e.setUnfinishedMessage(builder.buildPartial());
+          } catch (com.google.protobuf.UninitializedMessageException e) {
+            throw e.asInvalidProtocolBufferException().setUnfinishedMessage(builder.buildPartial());
+          } catch (java.io.IOException e) {
+            throw new com.google.protobuf.InvalidProtocolBufferException(e)
+                .setUnfinishedMessage(builder.buildPartial());
+          }
+          return builder.buildPartial();
+        }
+      };
+
+  public static com.google.protobuf.Parser<BatchingDescriptorProto> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<BatchingDescriptorProto> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.api.BatchingDescriptorProto getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BatchingDescriptorProtoOrBuilder.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BatchingDescriptorProtoOrBuilder.java
new file mode 100644
index 0000000000..4175aedbc2
--- /dev/null
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BatchingDescriptorProtoOrBuilder.java
@@ -0,0 +1,148 @@
+/*
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// NO CHECKED-IN PROTOBUF GENCODE
+// source: google/api/client.proto
+// Protobuf Java Version: 4.33.2
+
+package com.google.api;
+
+@com.google.protobuf.Generated
+public interface BatchingDescriptorProtoOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.api.BatchingDescriptorProto)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * The repeated field in the request message to be aggregated by batching.
+   * </pre>
+   *
+   * <code>string batched_field = 1;</code>
+   *
+   * @return The batchedField.
+   */
+  java.lang.String getBatchedField();
+
+  /**
+   *
+   *
+   * <pre>
+   * The repeated field in the request message to be aggregated by batching.
+   * </pre>
+   *
+   * <code>string batched_field = 1;</code>
+   *
+   * @return The bytes for batchedField.
+   */
+  com.google.protobuf.ByteString getBatchedFieldBytes();
+
+  /**
+   *
+   *
+   * <pre>
+   * A list of the fields in the request message. Two requests will be batched
+   * together only if the values of every field specified in
+   * `request_discriminator_fields` is equal between the two requests.
+   * </pre>
+   *
+   * <code>repeated string discriminator_fields = 2;</code>
+   *
+   * @return A list containing the discriminatorFields.
+   */
+  java.util.List<java.lang.String> getDiscriminatorFieldsList();
+
+  /**
+   *
+   *
+   * <pre>
+   * A list of the fields in the request message. Two requests will be batched
+   * together only if the values of every field specified in
+   * `request_discriminator_fields` is equal between the two requests.
+   * </pre>
+   *
+   * <code>repeated string discriminator_fields = 2;</code>
+   *
+   * @return The count of discriminatorFields.
+   */
+  int getDiscriminatorFieldsCount();
+
+  /**
+   *
+   *
+   * <pre>
+   * A list of the fields in the request message. Two requests will be batched
+   * together only if the values of every field specified in
+   * `request_discriminator_fields` is equal between the two requests.
+   * </pre>
+   *
+   * <code>repeated string discriminator_fields = 2;</code>
+   *
+   * @param index The index of the element to return.
+   * @return The discriminatorFields at the given index.
+   */
+  java.lang.String getDiscriminatorFields(int index);
+
+  /**
+   *
+   *
+   * <pre>
+   * A list of the fields in the request message. Two requests will be batched
+   * together only if the values of every field specified in
+   * `request_discriminator_fields` is equal between the two requests.
+   * </pre>
+   *
+   * <code>repeated string discriminator_fields = 2;</code>
+   *
+   * @param index The index of the value to return.
+   * @return The bytes of the discriminatorFields at the given index.
+   */
+  com.google.protobuf.ByteString getDiscriminatorFieldsBytes(int index);
+
+  /**
+   *
+   *
+   * <pre>
+   * Optional. When present, indicates the field in the response message to be
+   * used to demultiplex the response into multiple response messages, in
+   * correspondence with the multiple request messages originally batched
+   * together.
+   * </pre>
+   *
+   * <code>string subresponse_field = 3;</code>
+   *
+   * @return The subresponseField.
+   */
+  java.lang.String getSubresponseField();
+
+  /**
+   *
+   *
+   * <pre>
+   * Optional. When present, indicates the field in the response message to be
+   * used to demultiplex the response into multiple response messages, in
+   * correspondence with the multiple request messages originally batched
+   * together.
+   * </pre>
+   *
+   * <code>string subresponse_field = 3;</code>
+   *
+   * @return The bytes for subresponseField.
+   */
+  com.google.protobuf.ByteString getSubresponseFieldBytes();
+}
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BatchingSettingsProto.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BatchingSettingsProto.java
new file mode 100644
index 0000000000..02a3cd17a9
--- /dev/null
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BatchingSettingsProto.java
@@ -0,0 +1,1489 @@
+/*
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// NO CHECKED-IN PROTOBUF GENCODE
+// source: google/api/client.proto
+// Protobuf Java Version: 4.33.2
+
+package com.google.api;
+
+/**
+ *
+ *
+ * <pre>
+ * `BatchingSettingsProto` specifies a set of batching thresholds, each of
+ * which acts as a trigger to send a batch of messages as a request. At least
+ * one threshold must be positive nonzero.
+ * </pre>
+ *
+ * Protobuf type {@code google.api.BatchingSettingsProto}
+ */
+@com.google.protobuf.Generated
+public final class BatchingSettingsProto extends com.google.protobuf.GeneratedMessage
+    implements
+    // @@protoc_insertion_point(message_implements:google.api.BatchingSettingsProto)
+    BatchingSettingsProtoOrBuilder {
+  private static final long serialVersionUID = 0L;
+
+  static {
+    com.google.protobuf.RuntimeVersion.validateProtobufGencodeVersion(
+        com.google.protobuf.RuntimeVersion.RuntimeDomain.PUBLIC,
+        /* major= */ 4,
+        /* minor= */ 33,
+        /* patch= */ 2,
+        /* suffix= */ "",
+        "BatchingSettingsProto");
+  }
+
+  // Use BatchingSettingsProto.newBuilder() to construct.
+  private BatchingSettingsProto(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
+    super(builder);
+  }
+
+  private BatchingSettingsProto() {
+    flowControlLimitExceededBehavior_ = 0;
+  }
+
+  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+    return com.google.api.ClientProto.internal_static_google_api_BatchingSettingsProto_descriptor;
+  }
+
+  @java.lang.Override
+  protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internalGetFieldAccessorTable() {
+    return com.google.api.ClientProto
+        .internal_static_google_api_BatchingSettingsProto_fieldAccessorTable
+        .ensureFieldAccessorsInitialized(
+            com.google.api.BatchingSettingsProto.class,
+            com.google.api.BatchingSettingsProto.Builder.class);
+  }
+
+  private int bitField0_;
+  public static final int ELEMENT_COUNT_THRESHOLD_FIELD_NUMBER = 1;
+  private int elementCountThreshold_ = 0;
+
+  /**
+   *
+   *
+   * <pre>
+   * The number of elements of a field collected into a batch which, if
+   * exceeded, causes the batch to be sent.
+   * </pre>
+   *
+   * <code>int32 element_count_threshold = 1;</code>
+   *
+   * @return The elementCountThreshold.
+   */
+  @java.lang.Override
+  public int getElementCountThreshold() {
+    return elementCountThreshold_;
+  }
+
+  public static final int REQUEST_BYTE_THRESHOLD_FIELD_NUMBER = 2;
+  private long requestByteThreshold_ = 0L;
+
+  /**
+   *
+   *
+   * <pre>
+   * The aggregated size of the batched field which, if exceeded, causes the
+   * batch to be sent. This size is computed by aggregating the sizes of the
+   * request field to be batched, not of the entire request message.
+   * </pre>
+   *
+   * <code>int64 request_byte_threshold = 2;</code>
+   *
+   * @return The requestByteThreshold.
+   */
+  @java.lang.Override
+  public long getRequestByteThreshold() {
+    return requestByteThreshold_;
+  }
+
+  public static final int DELAY_THRESHOLD_FIELD_NUMBER = 3;
+  private com.google.protobuf.Duration delayThreshold_;
+
+  /**
+   *
+   *
+   * <pre>
+   * The duration after which a batch should be sent, starting from the addition
+   * of the first message to that batch.
+   * </pre>
+   *
+   * <code>.google.protobuf.Duration delay_threshold = 3;</code>
+   *
+   * @return Whether the delayThreshold field is set.
+   */
+  @java.lang.Override
+  public boolean hasDelayThreshold() {
+    return ((bitField0_ & 0x00000001) != 0);
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * The duration after which a batch should be sent, starting from the addition
+   * of the first message to that batch.
+   * </pre>
+   *
+   * <code>.google.protobuf.Duration delay_threshold = 3;</code>
+   *
+   * @return The delayThreshold.
+   */
+  @java.lang.Override
+  public com.google.protobuf.Duration getDelayThreshold() {
+    return delayThreshold_ == null
+        ? com.google.protobuf.Duration.getDefaultInstance()
+        : delayThreshold_;
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * The duration after which a batch should be sent, starting from the addition
+   * of the first message to that batch.
+   * </pre>
+   *
+   * <code>.google.protobuf.Duration delay_threshold = 3;</code>
+   */
+  @java.lang.Override
+  public com.google.protobuf.DurationOrBuilder getDelayThresholdOrBuilder() {
+    return delayThreshold_ == null
+        ? com.google.protobuf.Duration.getDefaultInstance()
+        : delayThreshold_;
+  }
+
+  public static final int ELEMENT_COUNT_LIMIT_FIELD_NUMBER = 4;
+  private int elementCountLimit_ = 0;
+
+  /**
+   *
+   *
+   * <pre>
+   * The maximum number of elements collected in a batch that could be accepted
+   * by server.
+   * </pre>
+   *
+   * <code>int32 element_count_limit = 4;</code>
+   *
+   * @return The elementCountLimit.
+   */
+  @java.lang.Override
+  public int getElementCountLimit() {
+    return elementCountLimit_;
+  }
+
+  public static final int REQUEST_BYTE_LIMIT_FIELD_NUMBER = 5;
+  private int requestByteLimit_ = 0;
+
+  /**
+   *
+   *
+   * <pre>
+   * The maximum size of the request that could be accepted by server.
+   * </pre>
+   *
+   * <code>int32 request_byte_limit = 5;</code>
+   *
+   * @return The requestByteLimit.
+   */
+  @java.lang.Override
+  public int getRequestByteLimit() {
+    return requestByteLimit_;
+  }
+
+  public static final int FLOW_CONTROL_ELEMENT_LIMIT_FIELD_NUMBER = 6;
+  private int flowControlElementLimit_ = 0;
+
+  /**
+   *
+   *
+   * <pre>
+   * The maximum number of elements allowed by flow control.
+   * </pre>
+   *
+   * <code>int32 flow_control_element_limit = 6;</code>
+   *
+   * @return The flowControlElementLimit.
+   */
+  @java.lang.Override
+  public int getFlowControlElementLimit() {
+    return flowControlElementLimit_;
+  }
+
+  public static final int FLOW_CONTROL_BYTE_LIMIT_FIELD_NUMBER = 7;
+  private int flowControlByteLimit_ = 0;
+
+  /**
+   *
+   *
+   * <pre>
+   * The maximum size of data allowed by flow control.
+   * </pre>
+   *
+   * <code>int32 flow_control_byte_limit = 7;</code>
+   *
+   * @return The flowControlByteLimit.
+   */
+  @java.lang.Override
+  public int getFlowControlByteLimit() {
+    return flowControlByteLimit_;
+  }
+
+  public static final int FLOW_CONTROL_LIMIT_EXCEEDED_BEHAVIOR_FIELD_NUMBER = 8;
+  private int flowControlLimitExceededBehavior_ = 0;
+
+  /**
+   *
+   *
+   * <pre>
+   * The behavior to take when the flow control limit is exceeded.
+   * </pre>
+   *
+   * <code>
+   * .google.api.FlowControlLimitExceededBehaviorProto flow_control_limit_exceeded_behavior = 8;
+   * </code>
+   *
+   * @return The enum numeric value on the wire for flowControlLimitExceededBehavior.
+   */
+  @java.lang.Override
+  public int getFlowControlLimitExceededBehaviorValue() {
+    return flowControlLimitExceededBehavior_;
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * The behavior to take when the flow control limit is exceeded.
+   * </pre>
+   *
+   * <code>
+   * .google.api.FlowControlLimitExceededBehaviorProto flow_control_limit_exceeded_behavior = 8;
+   * </code>
+   *
+   * @return The flowControlLimitExceededBehavior.
+   */
+  @java.lang.Override
+  public com.google.api.FlowControlLimitExceededBehaviorProto
+      getFlowControlLimitExceededBehavior() {
+    com.google.api.FlowControlLimitExceededBehaviorProto result =
+        com.google.api.FlowControlLimitExceededBehaviorProto.forNumber(
+            flowControlLimitExceededBehavior_);
+    return result == null
+        ? com.google.api.FlowControlLimitExceededBehaviorProto.UNRECOGNIZED
+        : result;
+  }
+
+  private byte memoizedIsInitialized = -1;
+
+  @java.lang.Override
+  public final boolean isInitialized() {
+    byte isInitialized = memoizedIsInitialized;
+    if (isInitialized == 1) return true;
+    if (isInitialized == 0) return false;
+
+    memoizedIsInitialized = 1;
+    return true;
+  }
+
+  @java.lang.Override
+  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
+    if (elementCountThreshold_ != 0) {
+      output.writeInt32(1, elementCountThreshold_);
+    }
+    if (requestByteThreshold_ != 0L) {
+      output.writeInt64(2, requestByteThreshold_);
+    }
+    if (((bitField0_ & 0x00000001) != 0)) {
+      output.writeMessage(3, getDelayThreshold());
+    }
+    if (elementCountLimit_ != 0) {
+      output.writeInt32(4, elementCountLimit_);
+    }
+    if (requestByteLimit_ != 0) {
+      output.writeInt32(5, requestByteLimit_);
+    }
+    if (flowControlElementLimit_ != 0) {
+      output.writeInt32(6, flowControlElementLimit_);
+    }
+    if (flowControlByteLimit_ != 0) {
+      output.writeInt32(7, flowControlByteLimit_);
+    }
+    if (flowControlLimitExceededBehavior_
+        != com.google.api.FlowControlLimitExceededBehaviorProto.UNSET_BEHAVIOR.getNumber()) {
+      output.writeEnum(8, flowControlLimitExceededBehavior_);
+    }
+    getUnknownFields().writeTo(output);
+  }
+
+  @java.lang.Override
+  public int getSerializedSize() {
+    int size = memoizedSize;
+    if (size != -1) return size;
+
+    size = 0;
+    if (elementCountThreshold_ != 0) {
+      size += com.google.protobuf.CodedOutputStream.computeInt32Size(1, elementCountThreshold_);
+    }
+    if (requestByteThreshold_ != 0L) {
+      size += com.google.protobuf.CodedOutputStream.computeInt64Size(2, requestByteThreshold_);
+    }
+    if (((bitField0_ & 0x00000001) != 0)) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(3, getDelayThreshold());
+    }
+    if (elementCountLimit_ != 0) {
+      size += com.google.protobuf.CodedOutputStream.computeInt32Size(4, elementCountLimit_);
+    }
+    if (requestByteLimit_ != 0) {
+      size += com.google.protobuf.CodedOutputStream.computeInt32Size(5, requestByteLimit_);
+    }
+    if (flowControlElementLimit_ != 0) {
+      size += com.google.protobuf.CodedOutputStream.computeInt32Size(6, flowControlElementLimit_);
+    }
+    if (flowControlByteLimit_ != 0) {
+      size += com.google.protobuf.CodedOutputStream.computeInt32Size(7, flowControlByteLimit_);
+    }
+    if (flowControlLimitExceededBehavior_
+        != com.google.api.FlowControlLimitExceededBehaviorProto.UNSET_BEHAVIOR.getNumber()) {
+      size +=
+          com.google.protobuf.CodedOutputStream.computeEnumSize(
+              8, flowControlLimitExceededBehavior_);
+    }
+    size += getUnknownFields().getSerializedSize();
+    memoizedSize = size;
+    return size;
+  }
+
+  @java.lang.Override
+  public boolean equals(final java.lang.Object obj) {
+    if (obj == this) {
+      return true;
+    }
+    if (!(obj instanceof com.google.api.BatchingSettingsProto)) {
+      return super.equals(obj);
+    }
+    com.google.api.BatchingSettingsProto other = (com.google.api.BatchingSettingsProto) obj;
+
+    if (getElementCountThreshold() != other.getElementCountThreshold()) return false;
+    if (getRequestByteThreshold() != other.getRequestByteThreshold()) return false;
+    if (hasDelayThreshold() != other.hasDelayThreshold()) return false;
+    if (hasDelayThreshold()) {
+      if (!getDelayThreshold().equals(other.getDelayThreshold())) return false;
+    }
+    if (getElementCountLimit() != other.getElementCountLimit()) return false;
+    if (getRequestByteLimit() != other.getRequestByteLimit()) return false;
+    if (getFlowControlElementLimit() != other.getFlowControlElementLimit()) return false;
+    if (getFlowControlByteLimit() != other.getFlowControlByteLimit()) return false;
+    if (flowControlLimitExceededBehavior_ != other.flowControlLimitExceededBehavior_) return false;
+    if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+    return true;
+  }
+
+  @java.lang.Override
+  public int hashCode() {
+    if (memoizedHashCode != 0) {
+      return memoizedHashCode;
+    }
+    int hash = 41;
+    hash = (19 * hash) + getDescriptor().hashCode();
+    hash = (37 * hash) + ELEMENT_COUNT_THRESHOLD_FIELD_NUMBER;
+    hash = (53 * hash) + getElementCountThreshold();
+    hash = (37 * hash) + REQUEST_BYTE_THRESHOLD_FIELD_NUMBER;
+    hash = (53 * hash) + com.google.protobuf.Internal.hashLong(getRequestByteThreshold());
+    if (hasDelayThreshold()) {
+      hash = (37 * hash) + DELAY_THRESHOLD_FIELD_NUMBER;
+      hash = (53 * hash) + getDelayThreshold().hashCode();
+    }
+    hash = (37 * hash) + ELEMENT_COUNT_LIMIT_FIELD_NUMBER;
+    hash = (53 * hash) + getElementCountLimit();
+    hash = (37 * hash) + REQUEST_BYTE_LIMIT_FIELD_NUMBER;
+    hash = (53 * hash) + getRequestByteLimit();
+    hash = (37 * hash) + FLOW_CONTROL_ELEMENT_LIMIT_FIELD_NUMBER;
+    hash = (53 * hash) + getFlowControlElementLimit();
+    hash = (37 * hash) + FLOW_CONTROL_BYTE_LIMIT_FIELD_NUMBER;
+    hash = (53 * hash) + getFlowControlByteLimit();
+    hash = (37 * hash) + FLOW_CONTROL_LIMIT_EXCEEDED_BEHAVIOR_FIELD_NUMBER;
+    hash = (53 * hash) + flowControlLimitExceededBehavior_;
+    hash = (29 * hash) + getUnknownFields().hashCode();
+    memoizedHashCode = hash;
+    return hash;
+  }
+
+  public static com.google.api.BatchingSettingsProto parseFrom(java.nio.ByteBuffer data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.api.BatchingSettingsProto parseFrom(
+      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.api.BatchingSettingsProto parseFrom(com.google.protobuf.ByteString data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.api.BatchingSettingsProto parseFrom(
+      com.google.protobuf.ByteString data,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.api.BatchingSettingsProto parseFrom(byte[] data)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data);
+  }
+
+  public static com.google.api.BatchingSettingsProto parseFrom(
+      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws com.google.protobuf.InvalidProtocolBufferException {
+    return PARSER.parseFrom(data, extensionRegistry);
+  }
+
+  public static com.google.api.BatchingSettingsProto parseFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.api.BatchingSettingsProto parseFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.api.BatchingSettingsProto parseDelimitedFrom(java.io.InputStream input)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage.parseDelimitedWithIOException(PARSER, input);
+  }
+
+  public static com.google.api.BatchingSettingsProto parseDelimitedFrom(
+      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage.parseDelimitedWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  public static com.google.api.BatchingSettingsProto parseFrom(
+      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage.parseWithIOException(PARSER, input);
+  }
+
+  public static com.google.api.BatchingSettingsProto parseFrom(
+      com.google.protobuf.CodedInputStream input,
+      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+      throws java.io.IOException {
+    return com.google.protobuf.GeneratedMessage.parseWithIOException(
+        PARSER, input, extensionRegistry);
+  }
+
+  @java.lang.Override
+  public Builder newBuilderForType() {
+    return newBuilder();
+  }
+
+  public static Builder newBuilder() {
+    return DEFAULT_INSTANCE.toBuilder();
+  }
+
+  public static Builder newBuilder(com.google.api.BatchingSettingsProto prototype) {
+    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+  }
+
+  @java.lang.Override
+  public Builder toBuilder() {
+    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
+  }
+
+  @java.lang.Override
+  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+    Builder builder = new Builder(parent);
+    return builder;
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * `BatchingSettingsProto` specifies a set of batching thresholds, each of
+   * which acts as a trigger to send a batch of messages as a request. At least
+   * one threshold must be positive nonzero.
+   * </pre>
+   *
+   * Protobuf type {@code google.api.BatchingSettingsProto}
+   */
+  public static final class Builder extends com.google.protobuf.GeneratedMessage.Builder<Builder>
+      implements
+      // @@protoc_insertion_point(builder_implements:google.api.BatchingSettingsProto)
+      com.google.api.BatchingSettingsProtoOrBuilder {
+    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
+      return com.google.api.ClientProto.internal_static_google_api_BatchingSettingsProto_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.google.api.ClientProto
+          .internal_static_google_api_BatchingSettingsProto_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              com.google.api.BatchingSettingsProto.class,
+              com.google.api.BatchingSettingsProto.Builder.class);
+    }
+
+    // Construct using com.google.api.BatchingSettingsProto.newBuilder()
+    private Builder() {
+      maybeForceBuilderInitialization();
+    }
+
+    private Builder(com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+      super(parent);
+      maybeForceBuilderInitialization();
+    }
+
+    private void maybeForceBuilderInitialization() {
+      if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
+        internalGetDelayThresholdFieldBuilder();
+      }
+    }
+
+    @java.lang.Override
+    public Builder clear() {
+      super.clear();
+      bitField0_ = 0;
+      elementCountThreshold_ = 0;
+      requestByteThreshold_ = 0L;
+      delayThreshold_ = null;
+      if (delayThresholdBuilder_ != null) {
+        delayThresholdBuilder_.dispose();
+        delayThresholdBuilder_ = null;
+      }
+      elementCountLimit_ = 0;
+      requestByteLimit_ = 0;
+      flowControlElementLimit_ = 0;
+      flowControlByteLimit_ = 0;
+      flowControlLimitExceededBehavior_ = 0;
+      return this;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
+      return com.google.api.ClientProto.internal_static_google_api_BatchingSettingsProto_descriptor;
+    }
+
+    @java.lang.Override
+    public com.google.api.BatchingSettingsProto getDefaultInstanceForType() {
+      return com.google.api.BatchingSettingsProto.getDefaultInstance();
+    }
+
+    @java.lang.Override
+    public com.google.api.BatchingSettingsProto build() {
+      com.google.api.BatchingSettingsProto result = buildPartial();
+      if (!result.isInitialized()) {
+        throw newUninitializedMessageException(result);
+      }
+      return result;
+    }
+
+    @java.lang.Override
+    public com.google.api.BatchingSettingsProto buildPartial() {
+      com.google.api.BatchingSettingsProto result = new com.google.api.BatchingSettingsProto(this);
+      if (bitField0_ != 0) {
+        buildPartial0(result);
+      }
+      onBuilt();
+      return result;
+    }
+
+    private void buildPartial0(com.google.api.BatchingSettingsProto result) {
+      int from_bitField0_ = bitField0_;
+      if (((from_bitField0_ & 0x00000001) != 0)) {
+        result.elementCountThreshold_ = elementCountThreshold_;
+      }
+      if (((from_bitField0_ & 0x00000002) != 0)) {
+        result.requestByteThreshold_ = requestByteThreshold_;
+      }
+      int to_bitField0_ = 0;
+      if (((from_bitField0_ & 0x00000004) != 0)) {
+        result.delayThreshold_ =
+            delayThresholdBuilder_ == null ? delayThreshold_ : delayThresholdBuilder_.build();
+        to_bitField0_ |= 0x00000001;
+      }
+      if (((from_bitField0_ & 0x00000008) != 0)) {
+        result.elementCountLimit_ = elementCountLimit_;
+      }
+      if (((from_bitField0_ & 0x00000010) != 0)) {
+        result.requestByteLimit_ = requestByteLimit_;
+      }
+      if (((from_bitField0_ & 0x00000020) != 0)) {
+        result.flowControlElementLimit_ = flowControlElementLimit_;
+      }
+      if (((from_bitField0_ & 0x00000040) != 0)) {
+        result.flowControlByteLimit_ = flowControlByteLimit_;
+      }
+      if (((from_bitField0_ & 0x00000080) != 0)) {
+        result.flowControlLimitExceededBehavior_ = flowControlLimitExceededBehavior_;
+      }
+      result.bitField0_ |= to_bitField0_;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(com.google.protobuf.Message other) {
+      if (other instanceof com.google.api.BatchingSettingsProto) {
+        return mergeFrom((com.google.api.BatchingSettingsProto) other);
+      } else {
+        super.mergeFrom(other);
+        return this;
+      }
+    }
+
+    public Builder mergeFrom(com.google.api.BatchingSettingsProto other) {
+      if (other == com.google.api.BatchingSettingsProto.getDefaultInstance()) return this;
+      if (other.getElementCountThreshold() != 0) {
+        setElementCountThreshold(other.getElementCountThreshold());
+      }
+      if (other.getRequestByteThreshold() != 0L) {
+        setRequestByteThreshold(other.getRequestByteThreshold());
+      }
+      if (other.hasDelayThreshold()) {
+        mergeDelayThreshold(other.getDelayThreshold());
+      }
+      if (other.getElementCountLimit() != 0) {
+        setElementCountLimit(other.getElementCountLimit());
+      }
+      if (other.getRequestByteLimit() != 0) {
+        setRequestByteLimit(other.getRequestByteLimit());
+      }
+      if (other.getFlowControlElementLimit() != 0) {
+        setFlowControlElementLimit(other.getFlowControlElementLimit());
+      }
+      if (other.getFlowControlByteLimit() != 0) {
+        setFlowControlByteLimit(other.getFlowControlByteLimit());
+      }
+      if (other.flowControlLimitExceededBehavior_ != 0) {
+        setFlowControlLimitExceededBehaviorValue(other.getFlowControlLimitExceededBehaviorValue());
+      }
+      this.mergeUnknownFields(other.getUnknownFields());
+      onChanged();
+      return this;
+    }
+
+    @java.lang.Override
+    public final boolean isInitialized() {
+      return true;
+    }
+
+    @java.lang.Override
+    public Builder mergeFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      if (extensionRegistry == null) {
+        throw new java.lang.NullPointerException();
+      }
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            case 8:
+              {
+                elementCountThreshold_ = input.readInt32();
+                bitField0_ |= 0x00000001;
+                break;
+              } // case 8
+            case 16:
+              {
+                requestByteThreshold_ = input.readInt64();
+                bitField0_ |= 0x00000002;
+                break;
+              } // case 16
+            case 26:
+              {
+                input.readMessage(
+                    internalGetDelayThresholdFieldBuilder().getBuilder(), extensionRegistry);
+                bitField0_ |= 0x00000004;
+                break;
+              } // case 26
+            case 32:
+              {
+                elementCountLimit_ = input.readInt32();
+                bitField0_ |= 0x00000008;
+                break;
+              } // case 32
+            case 40:
+              {
+                requestByteLimit_ = input.readInt32();
+                bitField0_ |= 0x00000010;
+                break;
+              } // case 40
+            case 48:
+              {
+                flowControlElementLimit_ = input.readInt32();
+                bitField0_ |= 0x00000020;
+                break;
+              } // case 48
+            case 56:
+              {
+                flowControlByteLimit_ = input.readInt32();
+                bitField0_ |= 0x00000040;
+                break;
+              } // case 56
+            case 64:
+              {
+                flowControlLimitExceededBehavior_ = input.readEnum();
+                bitField0_ |= 0x00000080;
+                break;
+              } // case 64
+            default:
+              {
+                if (!super.parseUnknownField(input, extensionRegistry, tag)) {
+                  done = true; // was an endgroup tag
+                }
+                break;
+              } // default:
+          } // switch (tag)
+        } // while (!done)
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.unwrapIOException();
+      } finally {
+        onChanged();
+      } // finally
+      return this;
+    }
+
+    private int bitField0_;
+
+    private int elementCountThreshold_;
+
+    /**
+     *
+     *
+     * <pre>
+     * The number of elements of a field collected into a batch which, if
+     * exceeded, causes the batch to be sent.
+     * </pre>
+     *
+     * <code>int32 element_count_threshold = 1;</code>
+     *
+     * @return The elementCountThreshold.
+     */
+    @java.lang.Override
+    public int getElementCountThreshold() {
+      return elementCountThreshold_;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The number of elements of a field collected into a batch which, if
+     * exceeded, causes the batch to be sent.
+     * </pre>
+     *
+     * <code>int32 element_count_threshold = 1;</code>
+     *
+     * @param value The elementCountThreshold to set.
+     * @return This builder for chaining.
+     */
+    public Builder setElementCountThreshold(int value) {
+
+      elementCountThreshold_ = value;
+      bitField0_ |= 0x00000001;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The number of elements of a field collected into a batch which, if
+     * exceeded, causes the batch to be sent.
+     * </pre>
+     *
+     * <code>int32 element_count_threshold = 1;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearElementCountThreshold() {
+      bitField0_ = (bitField0_ & ~0x00000001);
+      elementCountThreshold_ = 0;
+      onChanged();
+      return this;
+    }
+
+    private long requestByteThreshold_;
+
+    /**
+     *
+     *
+     * <pre>
+     * The aggregated size of the batched field which, if exceeded, causes the
+     * batch to be sent. This size is computed by aggregating the sizes of the
+     * request field to be batched, not of the entire request message.
+     * </pre>
+     *
+     * <code>int64 request_byte_threshold = 2;</code>
+     *
+     * @return The requestByteThreshold.
+     */
+    @java.lang.Override
+    public long getRequestByteThreshold() {
+      return requestByteThreshold_;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The aggregated size of the batched field which, if exceeded, causes the
+     * batch to be sent. This size is computed by aggregating the sizes of the
+     * request field to be batched, not of the entire request message.
+     * </pre>
+     *
+     * <code>int64 request_byte_threshold = 2;</code>
+     *
+     * @param value The requestByteThreshold to set.
+     * @return This builder for chaining.
+     */
+    public Builder setRequestByteThreshold(long value) {
+
+      requestByteThreshold_ = value;
+      bitField0_ |= 0x00000002;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The aggregated size of the batched field which, if exceeded, causes the
+     * batch to be sent. This size is computed by aggregating the sizes of the
+     * request field to be batched, not of the entire request message.
+     * </pre>
+     *
+     * <code>int64 request_byte_threshold = 2;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearRequestByteThreshold() {
+      bitField0_ = (bitField0_ & ~0x00000002);
+      requestByteThreshold_ = 0L;
+      onChanged();
+      return this;
+    }
+
+    private com.google.protobuf.Duration delayThreshold_;
+    private com.google.protobuf.SingleFieldBuilder<
+            com.google.protobuf.Duration,
+            com.google.protobuf.Duration.Builder,
+            com.google.protobuf.DurationOrBuilder>
+        delayThresholdBuilder_;
+
+    /**
+     *
+     *
+     * <pre>
+     * The duration after which a batch should be sent, starting from the addition
+     * of the first message to that batch.
+     * </pre>
+     *
+     * <code>.google.protobuf.Duration delay_threshold = 3;</code>
+     *
+     * @return Whether the delayThreshold field is set.
+     */
+    public boolean hasDelayThreshold() {
+      return ((bitField0_ & 0x00000004) != 0);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The duration after which a batch should be sent, starting from the addition
+     * of the first message to that batch.
+     * </pre>
+     *
+     * <code>.google.protobuf.Duration delay_threshold = 3;</code>
+     *
+     * @return The delayThreshold.
+     */
+    public com.google.protobuf.Duration getDelayThreshold() {
+      if (delayThresholdBuilder_ == null) {
+        return delayThreshold_ == null
+            ? com.google.protobuf.Duration.getDefaultInstance()
+            : delayThreshold_;
+      } else {
+        return delayThresholdBuilder_.getMessage();
+      }
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The duration after which a batch should be sent, starting from the addition
+     * of the first message to that batch.
+     * </pre>
+     *
+     * <code>.google.protobuf.Duration delay_threshold = 3;</code>
+     */
+    public Builder setDelayThreshold(com.google.protobuf.Duration value) {
+      if (delayThresholdBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        delayThreshold_ = value;
+      } else {
+        delayThresholdBuilder_.setMessage(value);
+      }
+      bitField0_ |= 0x00000004;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The duration after which a batch should be sent, starting from the addition
+     * of the first message to that batch.
+     * </pre>
+     *
+     * <code>.google.protobuf.Duration delay_threshold = 3;</code>
+     */
+    public Builder setDelayThreshold(com.google.protobuf.Duration.Builder builderForValue) {
+      if (delayThresholdBuilder_ == null) {
+        delayThreshold_ = builderForValue.build();
+      } else {
+        delayThresholdBuilder_.setMessage(builderForValue.build());
+      }
+      bitField0_ |= 0x00000004;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The duration after which a batch should be sent, starting from the addition
+     * of the first message to that batch.
+     * </pre>
+     *
+     * <code>.google.protobuf.Duration delay_threshold = 3;</code>
+     */
+    public Builder mergeDelayThreshold(com.google.protobuf.Duration value) {
+      if (delayThresholdBuilder_ == null) {
+        if (((bitField0_ & 0x00000004) != 0)
+            && delayThreshold_ != null
+            && delayThreshold_ != com.google.protobuf.Duration.getDefaultInstance()) {
+          getDelayThresholdBuilder().mergeFrom(value);
+        } else {
+          delayThreshold_ = value;
+        }
+      } else {
+        delayThresholdBuilder_.mergeFrom(value);
+      }
+      if (delayThreshold_ != null) {
+        bitField0_ |= 0x00000004;
+        onChanged();
+      }
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The duration after which a batch should be sent, starting from the addition
+     * of the first message to that batch.
+     * </pre>
+     *
+     * <code>.google.protobuf.Duration delay_threshold = 3;</code>
+     */
+    public Builder clearDelayThreshold() {
+      bitField0_ = (bitField0_ & ~0x00000004);
+      delayThreshold_ = null;
+      if (delayThresholdBuilder_ != null) {
+        delayThresholdBuilder_.dispose();
+        delayThresholdBuilder_ = null;
+      }
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The duration after which a batch should be sent, starting from the addition
+     * of the first message to that batch.
+     * </pre>
+     *
+     * <code>.google.protobuf.Duration delay_threshold = 3;</code>
+     */
+    public com.google.protobuf.Duration.Builder getDelayThresholdBuilder() {
+      bitField0_ |= 0x00000004;
+      onChanged();
+      return internalGetDelayThresholdFieldBuilder().getBuilder();
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The duration after which a batch should be sent, starting from the addition
+     * of the first message to that batch.
+     * </pre>
+     *
+     * <code>.google.protobuf.Duration delay_threshold = 3;</code>
+     */
+    public com.google.protobuf.DurationOrBuilder getDelayThresholdOrBuilder() {
+      if (delayThresholdBuilder_ != null) {
+        return delayThresholdBuilder_.getMessageOrBuilder();
+      } else {
+        return delayThreshold_ == null
+            ? com.google.protobuf.Duration.getDefaultInstance()
+            : delayThreshold_;
+      }
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The duration after which a batch should be sent, starting from the addition
+     * of the first message to that batch.
+     * </pre>
+     *
+     * <code>.google.protobuf.Duration delay_threshold = 3;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilder<
+            com.google.protobuf.Duration,
+            com.google.protobuf.Duration.Builder,
+            com.google.protobuf.DurationOrBuilder>
+        internalGetDelayThresholdFieldBuilder() {
+      if (delayThresholdBuilder_ == null) {
+        delayThresholdBuilder_ =
+            new com.google.protobuf.SingleFieldBuilder<
+                com.google.protobuf.Duration,
+                com.google.protobuf.Duration.Builder,
+                com.google.protobuf.DurationOrBuilder>(
+                getDelayThreshold(), getParentForChildren(), isClean());
+        delayThreshold_ = null;
+      }
+      return delayThresholdBuilder_;
+    }
+
+    private int elementCountLimit_;
+
+    /**
+     *
+     *
+     * <pre>
+     * The maximum number of elements collected in a batch that could be accepted
+     * by server.
+     * </pre>
+     *
+     * <code>int32 element_count_limit = 4;</code>
+     *
+     * @return The elementCountLimit.
+     */
+    @java.lang.Override
+    public int getElementCountLimit() {
+      return elementCountLimit_;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The maximum number of elements collected in a batch that could be accepted
+     * by server.
+     * </pre>
+     *
+     * <code>int32 element_count_limit = 4;</code>
+     *
+     * @param value The elementCountLimit to set.
+     * @return This builder for chaining.
+     */
+    public Builder setElementCountLimit(int value) {
+
+      elementCountLimit_ = value;
+      bitField0_ |= 0x00000008;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The maximum number of elements collected in a batch that could be accepted
+     * by server.
+     * </pre>
+     *
+     * <code>int32 element_count_limit = 4;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearElementCountLimit() {
+      bitField0_ = (bitField0_ & ~0x00000008);
+      elementCountLimit_ = 0;
+      onChanged();
+      return this;
+    }
+
+    private int requestByteLimit_;
+
+    /**
+     *
+     *
+     * <pre>
+     * The maximum size of the request that could be accepted by server.
+     * </pre>
+     *
+     * <code>int32 request_byte_limit = 5;</code>
+     *
+     * @return The requestByteLimit.
+     */
+    @java.lang.Override
+    public int getRequestByteLimit() {
+      return requestByteLimit_;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The maximum size of the request that could be accepted by server.
+     * </pre>
+     *
+     * <code>int32 request_byte_limit = 5;</code>
+     *
+     * @param value The requestByteLimit to set.
+     * @return This builder for chaining.
+     */
+    public Builder setRequestByteLimit(int value) {
+
+      requestByteLimit_ = value;
+      bitField0_ |= 0x00000010;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The maximum size of the request that could be accepted by server.
+     * </pre>
+     *
+     * <code>int32 request_byte_limit = 5;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearRequestByteLimit() {
+      bitField0_ = (bitField0_ & ~0x00000010);
+      requestByteLimit_ = 0;
+      onChanged();
+      return this;
+    }
+
+    private int flowControlElementLimit_;
+
+    /**
+     *
+     *
+     * <pre>
+     * The maximum number of elements allowed by flow control.
+     * </pre>
+     *
+     * <code>int32 flow_control_element_limit = 6;</code>
+     *
+     * @return The flowControlElementLimit.
+     */
+    @java.lang.Override
+    public int getFlowControlElementLimit() {
+      return flowControlElementLimit_;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The maximum number of elements allowed by flow control.
+     * </pre>
+     *
+     * <code>int32 flow_control_element_limit = 6;</code>
+     *
+     * @param value The flowControlElementLimit to set.
+     * @return This builder for chaining.
+     */
+    public Builder setFlowControlElementLimit(int value) {
+
+      flowControlElementLimit_ = value;
+      bitField0_ |= 0x00000020;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The maximum number of elements allowed by flow control.
+     * </pre>
+     *
+     * <code>int32 flow_control_element_limit = 6;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearFlowControlElementLimit() {
+      bitField0_ = (bitField0_ & ~0x00000020);
+      flowControlElementLimit_ = 0;
+      onChanged();
+      return this;
+    }
+
+    private int flowControlByteLimit_;
+
+    /**
+     *
+     *
+     * <pre>
+     * The maximum size of data allowed by flow control.
+     * </pre>
+     *
+     * <code>int32 flow_control_byte_limit = 7;</code>
+     *
+     * @return The flowControlByteLimit.
+     */
+    @java.lang.Override
+    public int getFlowControlByteLimit() {
+      return flowControlByteLimit_;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The maximum size of data allowed by flow control.
+     * </pre>
+     *
+     * <code>int32 flow_control_byte_limit = 7;</code>
+     *
+     * @param value The flowControlByteLimit to set.
+     * @return This builder for chaining.
+     */
+    public Builder setFlowControlByteLimit(int value) {
+
+      flowControlByteLimit_ = value;
+      bitField0_ |= 0x00000040;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The maximum size of data allowed by flow control.
+     * </pre>
+     *
+     * <code>int32 flow_control_byte_limit = 7;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearFlowControlByteLimit() {
+      bitField0_ = (bitField0_ & ~0x00000040);
+      flowControlByteLimit_ = 0;
+      onChanged();
+      return this;
+    }
+
+    private int flowControlLimitExceededBehavior_ = 0;
+
+    /**
+     *
+     *
+     * <pre>
+     * The behavior to take when the flow control limit is exceeded.
+     * </pre>
+     *
+     * <code>
+     * .google.api.FlowControlLimitExceededBehaviorProto flow_control_limit_exceeded_behavior = 8;
+     * </code>
+     *
+     * @return The enum numeric value on the wire for flowControlLimitExceededBehavior.
+     */
+    @java.lang.Override
+    public int getFlowControlLimitExceededBehaviorValue() {
+      return flowControlLimitExceededBehavior_;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The behavior to take when the flow control limit is exceeded.
+     * </pre>
+     *
+     * <code>
+     * .google.api.FlowControlLimitExceededBehaviorProto flow_control_limit_exceeded_behavior = 8;
+     * </code>
+     *
+     * @param value The enum numeric value on the wire for flowControlLimitExceededBehavior to set.
+     * @return This builder for chaining.
+     */
+    public Builder setFlowControlLimitExceededBehaviorValue(int value) {
+      flowControlLimitExceededBehavior_ = value;
+      bitField0_ |= 0x00000080;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The behavior to take when the flow control limit is exceeded.
+     * </pre>
+     *
+     * <code>
+     * .google.api.FlowControlLimitExceededBehaviorProto flow_control_limit_exceeded_behavior = 8;
+     * </code>
+     *
+     * @return The flowControlLimitExceededBehavior.
+     */
+    @java.lang.Override
+    public com.google.api.FlowControlLimitExceededBehaviorProto
+        getFlowControlLimitExceededBehavior() {
+      com.google.api.FlowControlLimitExceededBehaviorProto result =
+          com.google.api.FlowControlLimitExceededBehaviorProto.forNumber(
+              flowControlLimitExceededBehavior_);
+      return result == null
+          ? com.google.api.FlowControlLimitExceededBehaviorProto.UNRECOGNIZED
+          : result;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The behavior to take when the flow control limit is exceeded.
+     * </pre>
+     *
+     * <code>
+     * .google.api.FlowControlLimitExceededBehaviorProto flow_control_limit_exceeded_behavior = 8;
+     * </code>
+     *
+     * @param value The flowControlLimitExceededBehavior to set.
+     * @return This builder for chaining.
+     */
+    public Builder setFlowControlLimitExceededBehavior(
+        com.google.api.FlowControlLimitExceededBehaviorProto value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      bitField0_ |= 0x00000080;
+      flowControlLimitExceededBehavior_ = value.getNumber();
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The behavior to take when the flow control limit is exceeded.
+     * </pre>
+     *
+     * <code>
+     * .google.api.FlowControlLimitExceededBehaviorProto flow_control_limit_exceeded_behavior = 8;
+     * </code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearFlowControlLimitExceededBehavior() {
+      bitField0_ = (bitField0_ & ~0x00000080);
+      flowControlLimitExceededBehavior_ = 0;
+      onChanged();
+      return this;
+    }
+
+    // @@protoc_insertion_point(builder_scope:google.api.BatchingSettingsProto)
+  }
+
+  // @@protoc_insertion_point(class_scope:google.api.BatchingSettingsProto)
+  private static final com.google.api.BatchingSettingsProto DEFAULT_INSTANCE;
+
+  static {
+    DEFAULT_INSTANCE = new com.google.api.BatchingSettingsProto();
+  }
+
+  public static com.google.api.BatchingSettingsProto getDefaultInstance() {
+    return DEFAULT_INSTANCE;
+  }
+
+  private static final com.google.protobuf.Parser<BatchingSettingsProto> PARSER =
+      new com.google.protobuf.AbstractParser<BatchingSettingsProto>() {
+        @java.lang.Override
+        public BatchingSettingsProto parsePartialFrom(
+            com.google.protobuf.CodedInputStream input,
+            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+            throws com.google.protobuf.InvalidProtocolBufferException {
+          Builder builder = newBuilder();
+          try {
+            builder.mergeFrom(input, extensionRegistry);
+          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+            throw e.setUnfinishedMessage(builder.buildPartial());
+          } catch (com.google.protobuf.UninitializedMessageException e) {
+            throw e.asInvalidProtocolBufferException().setUnfinishedMessage(builder.buildPartial());
+          } catch (java.io.IOException e) {
+            throw new com.google.protobuf.InvalidProtocolBufferException(e)
+                .setUnfinishedMessage(builder.buildPartial());
+          }
+          return builder.buildPartial();
+        }
+      };
+
+  public static com.google.protobuf.Parser<BatchingSettingsProto> parser() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.protobuf.Parser<BatchingSettingsProto> getParserForType() {
+    return PARSER;
+  }
+
+  @java.lang.Override
+  public com.google.api.BatchingSettingsProto getDefaultInstanceForType() {
+    return DEFAULT_INSTANCE;
+  }
+}
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BatchingSettingsProtoOrBuilder.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BatchingSettingsProtoOrBuilder.java
new file mode 100644
index 0000000000..13b8a9d8ec
--- /dev/null
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/BatchingSettingsProtoOrBuilder.java
@@ -0,0 +1,180 @@
+/*
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// NO CHECKED-IN PROTOBUF GENCODE
+// source: google/api/client.proto
+// Protobuf Java Version: 4.33.2
+
+package com.google.api;
+
+@com.google.protobuf.Generated
+public interface BatchingSettingsProtoOrBuilder
+    extends
+    // @@protoc_insertion_point(interface_extends:google.api.BatchingSettingsProto)
+    com.google.protobuf.MessageOrBuilder {
+
+  /**
+   *
+   *
+   * <pre>
+   * The number of elements of a field collected into a batch which, if
+   * exceeded, causes the batch to be sent.
+   * </pre>
+   *
+   * <code>int32 element_count_threshold = 1;</code>
+   *
+   * @return The elementCountThreshold.
+   */
+  int getElementCountThreshold();
+
+  /**
+   *
+   *
+   * <pre>
+   * The aggregated size of the batched field which, if exceeded, causes the
+   * batch to be sent. This size is computed by aggregating the sizes of the
+   * request field to be batched, not of the entire request message.
+   * </pre>
+   *
+   * <code>int64 request_byte_threshold = 2;</code>
+   *
+   * @return The requestByteThreshold.
+   */
+  long getRequestByteThreshold();
+
+  /**
+   *
+   *
+   * <pre>
+   * The duration after which a batch should be sent, starting from the addition
+   * of the first message to that batch.
+   * </pre>
+   *
+   * <code>.google.protobuf.Duration delay_threshold = 3;</code>
+   *
+   * @return Whether the delayThreshold field is set.
+   */
+  boolean hasDelayThreshold();
+
+  /**
+   *
+   *
+   * <pre>
+   * The duration after which a batch should be sent, starting from the addition
+   * of the first message to that batch.
+   * </pre>
+   *
+   * <code>.google.protobuf.Duration delay_threshold = 3;</code>
+   *
+   * @return The delayThreshold.
+   */
+  com.google.protobuf.Duration getDelayThreshold();
+
+  /**
+   *
+   *
+   * <pre>
+   * The duration after which a batch should be sent, starting from the addition
+   * of the first message to that batch.
+   * </pre>
+   *
+   * <code>.google.protobuf.Duration delay_threshold = 3;</code>
+   */
+  com.google.protobuf.DurationOrBuilder getDelayThresholdOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * The maximum number of elements collected in a batch that could be accepted
+   * by server.
+   * </pre>
+   *
+   * <code>int32 element_count_limit = 4;</code>
+   *
+   * @return The elementCountLimit.
+   */
+  int getElementCountLimit();
+
+  /**
+   *
+   *
+   * <pre>
+   * The maximum size of the request that could be accepted by server.
+   * </pre>
+   *
+   * <code>int32 request_byte_limit = 5;</code>
+   *
+   * @return The requestByteLimit.
+   */
+  int getRequestByteLimit();
+
+  /**
+   *
+   *
+   * <pre>
+   * The maximum number of elements allowed by flow control.
+   * </pre>
+   *
+   * <code>int32 flow_control_element_limit = 6;</code>
+   *
+   * @return The flowControlElementLimit.
+   */
+  int getFlowControlElementLimit();
+
+  /**
+   *
+   *
+   * <pre>
+   * The maximum size of data allowed by flow control.
+   * </pre>
+   *
+   * <code>int32 flow_control_byte_limit = 7;</code>
+   *
+   * @return The flowControlByteLimit.
+   */
+  int getFlowControlByteLimit();
+
+  /**
+   *
+   *
+   * <pre>
+   * The behavior to take when the flow control limit is exceeded.
+   * </pre>
+   *
+   * <code>
+   * .google.api.FlowControlLimitExceededBehaviorProto flow_control_limit_exceeded_behavior = 8;
+   * </code>
+   *
+   * @return The enum numeric value on the wire for flowControlLimitExceededBehavior.
+   */
+  int getFlowControlLimitExceededBehaviorValue();
+
+  /**
+   *
+   *
+   * <pre>
+   * The behavior to take when the flow control limit is exceeded.
+   * </pre>
+   *
+   * <code>
+   * .google.api.FlowControlLimitExceededBehaviorProto flow_control_limit_exceeded_behavior = 8;
+   * </code>
+   *
+   * @return The flowControlLimitExceededBehavior.
+   */
+  com.google.api.FlowControlLimitExceededBehaviorProto getFlowControlLimitExceededBehavior();
+}
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/ClientProto.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/ClientProto.java
index 47e1f26ea3..2dc623eeed 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/ClientProto.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/ClientProto.java
@@ -263,6 +263,18 @@ public static void registerAllExtensions(com.google.protobuf.ExtensionRegistry r
       internal_static_google_api_SelectiveGapicGeneration_descriptor;
   static final com.google.protobuf.GeneratedMessage.FieldAccessorTable
       internal_static_google_api_SelectiveGapicGeneration_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_api_BatchingConfigProto_descriptor;
+  static final com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_google_api_BatchingConfigProto_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_api_BatchingSettingsProto_descriptor;
+  static final com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_google_api_BatchingSettingsProto_fieldAccessorTable;
+  static final com.google.protobuf.Descriptors.Descriptor
+      internal_static_google_api_BatchingDescriptorProto_descriptor;
+  static final com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_google_api_BatchingDescriptorProto_fieldAccessorTable;
 
   public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
     return descriptor;
@@ -314,13 +326,14 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "\003key\030\001 \001(\t\022\r\n"
           + "\005value\030\002 \001(\t:\0028\001\"A\n"
           + "\013CppSettings\0222\n"
-          + "\006common\030\001 \001(\0132\".google.api.CommonLanguageSettings\"A\n"
+          + "\006common\030\001 \001(\0132\".google.api.CommonLanguageSettings\"Z\n"
           + "\013PhpSettings\0222\n"
-          + "\006common\030\001 \001(\0132\".google.api.CommonLanguageSettings\"\233\002\n"
+          + "\006common\030\001 \001(\0132\".google.api.CommonLanguageSettings\022\027\n"
+          + "\017library_package\030\002 \001(\t\"\233\002\n"
           + "\016PythonSettings\0222\n"
           + "\006common\030\001 \001(\0132\".google.api.CommonLanguageSettings\022N\n"
-          + "\025experimental_features\030\002"
-          + " \001(\0132/.google.api.PythonSettings.ExperimentalFeatures\032\204\001\n"
+          + "\025experimental_features\030\002 \001(\0132/.go"
+          + "ogle.api.PythonSettings.ExperimentalFeatures\032\204\001\n"
           + "\024ExperimentalFeatures\022\035\n"
           + "\025rest_async_io_enabled\030\001 \001(\010\022\'\n"
           + "\037protobuf_pythonic_types_enabled\030\002 \001(\010\022$\n"
@@ -329,10 +342,10 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "\006common\030\001 \001(\0132\".google.api.CommonLanguageSettings\"\252\003\n"
           + "\016DotnetSettings\0222\n"
           + "\006common\030\001 \001(\0132\".google.api.CommonLanguageSettings\022I\n"
-          + "\020renamed_services\030\002 \003(\0132"
-          + "/.google.api.DotnetSettings.RenamedServicesEntry\022K\n"
-          + "\021renamed_resources\030\003 \003(\01320.go"
-          + "ogle.api.DotnetSettings.RenamedResourcesEntry\022\031\n"
+          + "\020renamed_services\030\002"
+          + " \003(\0132/.google.api.DotnetSettings.RenamedServicesEntry\022K\n"
+          + "\021renamed_resources\030\003"
+          + " \003(\01320.google.api.DotnetSettings.RenamedResourcesEntry\022\031\n"
           + "\021ignored_resources\030\004 \003(\t\022 \n"
           + "\030forced_namespace_aliases\030\005 \003(\t\022\036\n"
           + "\026handwritten_signatures\030\006 \003(\t\0326\n"
@@ -346,15 +359,16 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "\006common\030\001 \001(\0132\".google.api.CommonLanguageSettings\"\277\001\n\n"
           + "GoSettings\0222\n"
           + "\006common\030\001 \001(\0132\".google.api.CommonLanguageSettings\022E\n"
-          + "\020renamed_services\030\002"
-          + " \003(\0132+.google.api.GoSettings.RenamedServicesEntry\0326\n"
+          + "\020renamed_services\030\002 \003(\0132+."
+          + "google.api.GoSettings.RenamedServicesEntry\0326\n"
           + "\024RenamedServicesEntry\022\013\n"
           + "\003key\030\001 \001(\t\022\r\n"
-          + "\005value\030\002 \001(\t:\0028\001\"\317\002\n"
+          + "\005value\030\002 \001(\t:\0028\001\"\202\003\n"
           + "\016MethodSettings\022\020\n"
           + "\010selector\030\001 \001(\t\022<\n"
           + "\014long_running\030\002 \001(\0132&.google.api.MethodSettings.LongRunning\022\035\n"
-          + "\025auto_populated_fields\030\003 \003(\t\032\315\001\n"
+          + "\025auto_populated_fields\030\003 \003(\t\0221\n"
+          + "\010batching\030\004 \001(\0132\037.google.api.BatchingConfigProto\032\315\001\n"
           + "\013LongRunning\0225\n"
           + "\022initial_poll_delay\030\001 \001(\0132\031.google.protobuf.Duration\022\035\n"
           + "\025poll_delay_multiplier\030\002 \001(\002\0221\n"
@@ -362,7 +376,25 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "\022total_poll_timeout\030\004 \001(\0132\031.google.protobuf.Duration\"Q\n"
           + "\030SelectiveGapicGeneration\022\017\n"
           + "\007methods\030\001 \003(\t\022$\n"
-          + "\034generate_omitted_as_internal\030\002 \001(\010*\243\001\n"
+          + "\034generate_omitted_as_internal\030\002 \001(\010\"\213\001\n"
+          + "\023BatchingConfigProto\0225\n\n"
+          + "thresholds\030\001 \001(\0132!.google.api.BatchingSettingsProto\022=\n"
+          + "\020batch_descriptor\030\002"
+          + " \001(\0132#.google.api.BatchingDescriptorProto\"\353\002\n"
+          + "\025BatchingSettingsProto\022\037\n"
+          + "\027element_count_threshold\030\001 \001(\005\022\036\n"
+          + "\026request_byte_threshold\030\002 \001(\003\0222\n"
+          + "\017delay_threshold\030\003 \001(\0132\031.google.protobuf.Duration\022\033\n"
+          + "\023element_count_limit\030\004 \001(\005\022\032\n"
+          + "\022request_byte_limit\030\005 \001(\005\022\"\n"
+          + "\032flow_control_element_limit\030\006 \001(\005\022\037\n"
+          + "\027flow_control_byte_limit\030\007 \001(\005\022_\n"
+          + "$flow_control_limit_exceeded_behavior\030\010 \001(\01621.google.api"
+          + ".FlowControlLimitExceededBehaviorProto\"i\n"
+          + "\027BatchingDescriptorProto\022\025\n\r"
+          + "batched_field\030\001 \001(\t\022\034\n"
+          + "\024discriminator_fields\030\002 \003(\t\022\031\n"
+          + "\021subresponse_field\030\003 \001(\t*\243\001\n"
           + "\031ClientLibraryOrganization\022+\n"
           + "\'CLIENT_LIBRARY_ORGANIZATION_UNSPECIFIED\020\000\022\t\n"
           + "\005CLOUD\020\001\022\007\n"
@@ -376,14 +408,19 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "&CLIENT_LIBRARY_DESTINATION_UNSPECIFIED\020\000\022\n\n"
           + "\006GITHUB\020\n"
           + "\022\023\n"
-          + "\017PACKAGE_MANAGER\020\024:9\n"
+          + "\017PACKAGE_MANAGER\020\024*g\n"
+          + "%FlowControlLimitExceededBehaviorProto\022\022\n"
+          + "\016UNSET_BEHAVIOR\020\000\022\023\n"
+          + "\017THROW_EXCEPTION\020\001\022\t\n"
+          + "\005BLOCK\020\002\022\n\n"
+          + "\006IGNORE\020\003:9\n"
           + "\020method_signature\022\036.google.protobuf.MethodOptions\030\233\010 \003(\t:6\n"
           + "\014default_host\022\037.google.protobuf.ServiceOptions\030\231\010 \001(\t:6\n"
           + "\014oauth_scopes\022\037.google.protobuf.ServiceOptions\030\232\010 \001(\t:8\n"
           + "\013api_version\022\037.google.protobuf.ServiceOptions\030\301\272\253\372\001 \001("
           + "\tBi\n"
-          + "\016com.google.apiB\013ClientProtoP\001ZAgoogle.gola"
-          + "ng.org/genproto/googleapis/api/annotations;annotations\242\002\004GAPIb\006proto3"
+          + "\016com.google.apiB\013ClientProtoP\001ZAgoogle.golang.o"
+          + "rg/genproto/googleapis/api/annotations;annotations\242\002\004GAPIb\006proto3"
     };
     descriptor =
         com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
@@ -462,7 +499,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
         new com.google.protobuf.GeneratedMessage.FieldAccessorTable(
             internal_static_google_api_PhpSettings_descriptor,
             new java.lang.String[] {
-              "Common",
+              "Common", "LibraryPackage",
             });
     internal_static_google_api_PythonSettings_descriptor = getDescriptor().getMessageType(6);
     internal_static_google_api_PythonSettings_fieldAccessorTable =
@@ -541,7 +578,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
         new com.google.protobuf.GeneratedMessage.FieldAccessorTable(
             internal_static_google_api_MethodSettings_descriptor,
             new java.lang.String[] {
-              "Selector", "LongRunning", "AutoPopulatedFields",
+              "Selector", "LongRunning", "AutoPopulatedFields", "Batching",
             });
     internal_static_google_api_MethodSettings_LongRunning_descriptor =
         internal_static_google_api_MethodSettings_descriptor.getNestedType(0);
@@ -559,6 +596,36 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
             new java.lang.String[] {
               "Methods", "GenerateOmittedAsInternal",
             });
+    internal_static_google_api_BatchingConfigProto_descriptor = getDescriptor().getMessageType(13);
+    internal_static_google_api_BatchingConfigProto_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+            internal_static_google_api_BatchingConfigProto_descriptor,
+            new java.lang.String[] {
+              "Thresholds", "BatchDescriptor",
+            });
+    internal_static_google_api_BatchingSettingsProto_descriptor =
+        getDescriptor().getMessageType(14);
+    internal_static_google_api_BatchingSettingsProto_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+            internal_static_google_api_BatchingSettingsProto_descriptor,
+            new java.lang.String[] {
+              "ElementCountThreshold",
+              "RequestByteThreshold",
+              "DelayThreshold",
+              "ElementCountLimit",
+              "RequestByteLimit",
+              "FlowControlElementLimit",
+              "FlowControlByteLimit",
+              "FlowControlLimitExceededBehavior",
+            });
+    internal_static_google_api_BatchingDescriptorProto_descriptor =
+        getDescriptor().getMessageType(15);
+    internal_static_google_api_BatchingDescriptorProto_fieldAccessorTable =
+        new com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+            internal_static_google_api_BatchingDescriptorProto_descriptor,
+            new java.lang.String[] {
+              "BatchedField", "DiscriminatorFields", "SubresponseField",
+            });
     methodSignature.internalInit(descriptor.getExtension(0));
     defaultHost.internalInit(descriptor.getExtension(1));
     oauthScopes.internalInit(descriptor.getExtension(2));
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/Control.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/Control.java
index 060efcaf64..f7668465a5 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/Control.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/Control.java
@@ -83,8 +83,8 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    * <pre>
    * The service controller environment to use. If empty, no control plane
-   * feature (like quota and billing) will be enabled. The recommended value for
-   * most services is servicecontrol.googleapis.com
+   * features (like quota and billing) will be enabled. The recommended value
+   * for most services is servicecontrol.googleapis.com.
    * </pre>
    *
    * <code>string environment = 1;</code>
@@ -109,8 +109,8 @@ public java.lang.String getEnvironment() {
    *
    * <pre>
    * The service controller environment to use. If empty, no control plane
-   * feature (like quota and billing) will be enabled. The recommended value for
-   * most services is servicecontrol.googleapis.com
+   * features (like quota and billing) will be enabled. The recommended value
+   * for most services is servicecontrol.googleapis.com.
    * </pre>
    *
    * <code>string environment = 1;</code>
@@ -590,8 +590,8 @@ public Builder mergeFrom(
      *
      * <pre>
      * The service controller environment to use. If empty, no control plane
-     * feature (like quota and billing) will be enabled. The recommended value for
-     * most services is servicecontrol.googleapis.com
+     * features (like quota and billing) will be enabled. The recommended value
+     * for most services is servicecontrol.googleapis.com.
      * </pre>
      *
      * <code>string environment = 1;</code>
@@ -615,8 +615,8 @@ public java.lang.String getEnvironment() {
      *
      * <pre>
      * The service controller environment to use. If empty, no control plane
-     * feature (like quota and billing) will be enabled. The recommended value for
-     * most services is servicecontrol.googleapis.com
+     * features (like quota and billing) will be enabled. The recommended value
+     * for most services is servicecontrol.googleapis.com.
      * </pre>
      *
      * <code>string environment = 1;</code>
@@ -640,8 +640,8 @@ public com.google.protobuf.ByteString getEnvironmentBytes() {
      *
      * <pre>
      * The service controller environment to use. If empty, no control plane
-     * feature (like quota and billing) will be enabled. The recommended value for
-     * most services is servicecontrol.googleapis.com
+     * features (like quota and billing) will be enabled. The recommended value
+     * for most services is servicecontrol.googleapis.com.
      * </pre>
      *
      * <code>string environment = 1;</code>
@@ -664,8 +664,8 @@ public Builder setEnvironment(java.lang.String value) {
      *
      * <pre>
      * The service controller environment to use. If empty, no control plane
-     * feature (like quota and billing) will be enabled. The recommended value for
-     * most services is servicecontrol.googleapis.com
+     * features (like quota and billing) will be enabled. The recommended value
+     * for most services is servicecontrol.googleapis.com.
      * </pre>
      *
      * <code>string environment = 1;</code>
@@ -684,8 +684,8 @@ public Builder clearEnvironment() {
      *
      * <pre>
      * The service controller environment to use. If empty, no control plane
-     * feature (like quota and billing) will be enabled. The recommended value for
-     * most services is servicecontrol.googleapis.com
+     * features (like quota and billing) will be enabled. The recommended value
+     * for most services is servicecontrol.googleapis.com.
      * </pre>
      *
      * <code>string environment = 1;</code>
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/ControlOrBuilder.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/ControlOrBuilder.java
index c92523c0f8..035cfbb3be 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/ControlOrBuilder.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/ControlOrBuilder.java
@@ -31,8 +31,8 @@ public interface ControlOrBuilder
    *
    * <pre>
    * The service controller environment to use. If empty, no control plane
-   * feature (like quota and billing) will be enabled. The recommended value for
-   * most services is servicecontrol.googleapis.com
+   * features (like quota and billing) will be enabled. The recommended value
+   * for most services is servicecontrol.googleapis.com.
    * </pre>
    *
    * <code>string environment = 1;</code>
@@ -46,8 +46,8 @@ public interface ControlOrBuilder
    *
    * <pre>
    * The service controller environment to use. If empty, no control plane
-   * feature (like quota and billing) will be enabled. The recommended value for
-   * most services is servicecontrol.googleapis.com
+   * features (like quota and billing) will be enabled. The recommended value
+   * for most services is servicecontrol.googleapis.com.
    * </pre>
    *
    * <code>string environment = 1;</code>
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/ErrorReason.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/ErrorReason.java
index 84f59f2904..8405c49de0 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/ErrorReason.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/ErrorReason.java
@@ -858,6 +858,268 @@ public enum ErrorReason implements com.google.protobuf.ProtocolMessageEnum {
    * <code>OVERLOADED_CREDENTIALS = 34;</code>
    */
   OVERLOADED_CREDENTIALS(34),
+  /**
+   *
+   *
+   * <pre>
+   * The request whose associated location violates the location org policy
+   * restrictions when creating resources in the restricted region.
+   *
+   * Example of an ErrorInfo when creating the Cloud Storage Bucket in the
+   * container "projects/123" under a restricted region
+   * "locations/asia-northeast3":
+   *
+   * {
+   * "reason": "LOCATION_ORG_POLICY_VIOLATED",
+   * "domain": "googleapis.com",
+   * "metadata": {
+   * "resource": "projects/123",
+   * "location": "locations/asia-northeast3"
+   * }
+   * }
+   *
+   * This response indicates creating the Cloud Storage Bucket in
+   * "locations/asia-northeast3" violates the location org policy restriction.
+   * </pre>
+   *
+   * <code>LOCATION_ORG_POLICY_VIOLATED = 35;</code>
+   */
+  LOCATION_ORG_POLICY_VIOLATED(35),
+  /**
+   *
+   *
+   * <pre>
+   * The request is denied because it access data of regulated customers using
+   * TLS 1.0 and 1.1.
+   *
+   * Example of an ErrorInfo when accessing a GCP resource "projects/123" that
+   * is restricted by TLS Version Restriction for "pubsub.googleapis.com"
+   * service.
+   *
+   * {
+   * "reason": "TLS_ORG_POLICY_VIOLATED",
+   * "domain": "googleapis.com",
+   * "metadata": {
+   * "service": "pubsub.googleapis.com"
+   * "resource": "projects/123",
+   * "policyName": "constraints/gcp.restrictTLSVersion",
+   * "tlsVersion": "TLS_VERSION_1"
+   * }
+   * }
+   * </pre>
+   *
+   * <code>TLS_ORG_POLICY_VIOLATED = 36;</code>
+   */
+  TLS_ORG_POLICY_VIOLATED(36),
+  /**
+   *
+   *
+   * <pre>
+   * The request is denied because the associated project has exceeded the
+   * emulator quota limit.
+   *
+   * Example of an ErrorInfo when the associated "projects/123" has exceeded the
+   * emulator quota limit.
+   *
+   * {
+   * "reason": "EMULATOR_QUOTA_EXCEEDED",
+   * "domain": "googleapis.com",
+   * "metadata": {
+   * "service": "pubsub.googleapis.com"
+   * "consumer": "projects/123"
+   * }
+   * }
+   * </pre>
+   *
+   * <code>EMULATOR_QUOTA_EXCEEDED = 38;</code>
+   */
+  EMULATOR_QUOTA_EXCEEDED(38),
+  /**
+   *
+   *
+   * <pre>
+   * The request is denied because the associated application credential header
+   * is invalid for an Android applications.
+   *
+   * Example of an ErrorInfo when the request from an Android application to the
+   * "pubsub.googleapis.com" with an invalid application credential header.
+   *
+   * {
+   * "reason": "CREDENTIAL_ANDROID_APP_INVALID",
+   * "domain": "googleapis.com",
+   * "metadata": {
+   * "service": "pubsub.googleapis.com"
+   * }
+   * }
+   * </pre>
+   *
+   * <code>CREDENTIAL_ANDROID_APP_INVALID = 39;</code>
+   */
+  CREDENTIAL_ANDROID_APP_INVALID(39),
+  /**
+   *
+   *
+   * <pre>
+   * The request is denied because IAM permission on resource is denied.
+   *
+   * Example of an ErrorInfo when the IAM permission `aiplatform.datasets.list`
+   * is denied on resource `projects/123`.
+   *
+   * {
+   * "reason": "IAM_PERMISSION_DENIED",
+   * "domain": "googleapis.com",
+   * "metadata": {
+   * "resource": "projects/123"
+   * "permission": "aiplatform.datasets.list"
+   * }
+   * }
+   * </pre>
+   *
+   * <code>IAM_PERMISSION_DENIED = 41;</code>
+   */
+  IAM_PERMISSION_DENIED(41),
+  /**
+   *
+   *
+   * <pre>
+   * The request is denied because it contains the invalid JWT token.
+   *
+   * Example of an ErrorInfo when the request contains an invalid JWT token for
+   * service `storage.googleapis.com`.
+   *
+   * {
+   * "reason": "JWT_TOKEN_INVALID",
+   * "domain": "googleapis.com",
+   * "metadata": {
+   * "service": "storage.googleapis.com"
+   * }
+   * }
+   * </pre>
+   *
+   * <code>JWT_TOKEN_INVALID = 42;</code>
+   */
+  JWT_TOKEN_INVALID(42),
+  /**
+   *
+   *
+   * <pre>
+   * The request is denied because it contains credential with type that is
+   * unsupported.
+   *
+   * Example of an ErrorInfo when the request contains an unsupported credential
+   * type for service `storage.googleapis.com`.
+   *
+   * {
+   * "reason": "CREDENTIAL_TYPE_UNSUPPORTED",
+   * "domain": "googleapis.com",
+   * "metadata": {
+   * "service": "storage.googleapis.com"
+   * }
+   * }
+   * </pre>
+   *
+   * <code>CREDENTIAL_TYPE_UNSUPPORTED = 43;</code>
+   */
+  CREDENTIAL_TYPE_UNSUPPORTED(43),
+  /**
+   *
+   *
+   * <pre>
+   * The request is denied because it contains unsupported account type.
+   *
+   * Example of an ErrorInfo when the request contains an unsupported account
+   * type for service `storage.googleapis.com`.
+   *
+   * {
+   * "reason": "ACCOUNT_TYPE_UNSUPPORTED",
+   * "domain": "googleapis.com",
+   * "metadata": {
+   * "service": "storage.googleapis.com"
+   * }
+   * }
+   * </pre>
+   *
+   * <code>ACCOUNT_TYPE_UNSUPPORTED = 44;</code>
+   */
+  ACCOUNT_TYPE_UNSUPPORTED(44),
+  /**
+   *
+   *
+   * <pre>
+   * The request is denied because the API endpoint is restricted by
+   * administrators according to the organization policy constraint.
+   * For more information see
+   * https://cloud.google.com/assured-workloads/docs/restrict-endpoint-usage.
+   *
+   * Example of an ErrorInfo when access to Google Cloud Storage service is
+   * restricted by Restrict Endpoint Usage policy:
+   *
+   * {
+   * "reason": "ENDPOINT_USAGE_RESTRICTION_VIOLATED",
+   * "domain": "googleapis.com/policies/endpointUsageRestriction",
+   * "metadata": {
+   * "policy_name": "constraints/gcp.restrictEndpointUsage",
+   * "checked_value": "storage.googleapis.com"
+   * "consumer": "organization/123"
+   * "service": "storage.googleapis.com"
+   * }
+   * }
+   * </pre>
+   *
+   * <code>ENDPOINT_USAGE_RESTRICTION_VIOLATED = 45;</code>
+   */
+  ENDPOINT_USAGE_RESTRICTION_VIOLATED(45),
+  /**
+   *
+   *
+   * <pre>
+   * The request is denied because the TLS Cipher Suite is restricted by
+   * administrators according to the organization policy constraint.
+   * For more information see
+   * https://cloud.google.com/assured-workloads/docs/restrict-tls-cipher-suites
+   *
+   * Example of an ErrorInfo when access to Google Cloud BigQuery service is
+   * restricted by Restrict TLS Cipher Suites policy:
+   *
+   * {
+   * "reason": "TLS_CIPHER_RESTRICTION_VIOLATED",
+   * "domain": "googleapis.com/policies/tlsCipherRestriction",
+   * "metadata": {
+   * "policy_name": "constraints/gcp.restrictTLSCipherSuites",
+   * "checked_value": "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
+   * "consumer": "organization/123"
+   * "service": "bigquery.googleapis.com"
+   * }
+   * }
+   * </pre>
+   *
+   * <code>TLS_CIPHER_RESTRICTION_VIOLATED = 46;</code>
+   */
+  TLS_CIPHER_RESTRICTION_VIOLATED(46),
+  /**
+   *
+   *
+   * <pre>
+   * The request is denied because the MCP activation check fails.
+   *
+   * Example of an ErrorInfo when the container "projects/123" contacting
+   * "pubsub.googleapis.com" service which is disabled by MCP:
+   *
+   * { "reason": "MCP_SERVER_DISABLED",
+   * "domain": "googleapis.com",
+   * "metadata": {
+   * "consumer": "projects/123",
+   * "service": "pubsub.googleapis.com"
+   * }
+   * }
+   *
+   * This response indicates the "pubsub.googleapis.com" has been disabled in
+   * "projects/123" for MCP.
+   * </pre>
+   *
+   * <code>MCP_SERVER_DISABLED = 47;</code>
+   */
+  MCP_SERVER_DISABLED(47),
   UNRECOGNIZED(-1),
   ;
 
@@ -1722,6 +1984,279 @@ public enum ErrorReason implements com.google.protobuf.ProtocolMessageEnum {
    */
   public static final int OVERLOADED_CREDENTIALS_VALUE = 34;
 
+  /**
+   *
+   *
+   * <pre>
+   * The request whose associated location violates the location org policy
+   * restrictions when creating resources in the restricted region.
+   *
+   * Example of an ErrorInfo when creating the Cloud Storage Bucket in the
+   * container "projects/123" under a restricted region
+   * "locations/asia-northeast3":
+   *
+   * {
+   * "reason": "LOCATION_ORG_POLICY_VIOLATED",
+   * "domain": "googleapis.com",
+   * "metadata": {
+   * "resource": "projects/123",
+   * "location": "locations/asia-northeast3"
+   * }
+   * }
+   *
+   * This response indicates creating the Cloud Storage Bucket in
+   * "locations/asia-northeast3" violates the location org policy restriction.
+   * </pre>
+   *
+   * <code>LOCATION_ORG_POLICY_VIOLATED = 35;</code>
+   */
+  public static final int LOCATION_ORG_POLICY_VIOLATED_VALUE = 35;
+
+  /**
+   *
+   *
+   * <pre>
+   * The request is denied because it access data of regulated customers using
+   * TLS 1.0 and 1.1.
+   *
+   * Example of an ErrorInfo when accessing a GCP resource "projects/123" that
+   * is restricted by TLS Version Restriction for "pubsub.googleapis.com"
+   * service.
+   *
+   * {
+   * "reason": "TLS_ORG_POLICY_VIOLATED",
+   * "domain": "googleapis.com",
+   * "metadata": {
+   * "service": "pubsub.googleapis.com"
+   * "resource": "projects/123",
+   * "policyName": "constraints/gcp.restrictTLSVersion",
+   * "tlsVersion": "TLS_VERSION_1"
+   * }
+   * }
+   * </pre>
+   *
+   * <code>TLS_ORG_POLICY_VIOLATED = 36;</code>
+   */
+  public static final int TLS_ORG_POLICY_VIOLATED_VALUE = 36;
+
+  /**
+   *
+   *
+   * <pre>
+   * The request is denied because the associated project has exceeded the
+   * emulator quota limit.
+   *
+   * Example of an ErrorInfo when the associated "projects/123" has exceeded the
+   * emulator quota limit.
+   *
+   * {
+   * "reason": "EMULATOR_QUOTA_EXCEEDED",
+   * "domain": "googleapis.com",
+   * "metadata": {
+   * "service": "pubsub.googleapis.com"
+   * "consumer": "projects/123"
+   * }
+   * }
+   * </pre>
+   *
+   * <code>EMULATOR_QUOTA_EXCEEDED = 38;</code>
+   */
+  public static final int EMULATOR_QUOTA_EXCEEDED_VALUE = 38;
+
+  /**
+   *
+   *
+   * <pre>
+   * The request is denied because the associated application credential header
+   * is invalid for an Android applications.
+   *
+   * Example of an ErrorInfo when the request from an Android application to the
+   * "pubsub.googleapis.com" with an invalid application credential header.
+   *
+   * {
+   * "reason": "CREDENTIAL_ANDROID_APP_INVALID",
+   * "domain": "googleapis.com",
+   * "metadata": {
+   * "service": "pubsub.googleapis.com"
+   * }
+   * }
+   * </pre>
+   *
+   * <code>CREDENTIAL_ANDROID_APP_INVALID = 39;</code>
+   */
+  public static final int CREDENTIAL_ANDROID_APP_INVALID_VALUE = 39;
+
+  /**
+   *
+   *
+   * <pre>
+   * The request is denied because IAM permission on resource is denied.
+   *
+   * Example of an ErrorInfo when the IAM permission `aiplatform.datasets.list`
+   * is denied on resource `projects/123`.
+   *
+   * {
+   * "reason": "IAM_PERMISSION_DENIED",
+   * "domain": "googleapis.com",
+   * "metadata": {
+   * "resource": "projects/123"
+   * "permission": "aiplatform.datasets.list"
+   * }
+   * }
+   * </pre>
+   *
+   * <code>IAM_PERMISSION_DENIED = 41;</code>
+   */
+  public static final int IAM_PERMISSION_DENIED_VALUE = 41;
+
+  /**
+   *
+   *
+   * <pre>
+   * The request is denied because it contains the invalid JWT token.
+   *
+   * Example of an ErrorInfo when the request contains an invalid JWT token for
+   * service `storage.googleapis.com`.
+   *
+   * {
+   * "reason": "JWT_TOKEN_INVALID",
+   * "domain": "googleapis.com",
+   * "metadata": {
+   * "service": "storage.googleapis.com"
+   * }
+   * }
+   * </pre>
+   *
+   * <code>JWT_TOKEN_INVALID = 42;</code>
+   */
+  public static final int JWT_TOKEN_INVALID_VALUE = 42;
+
+  /**
+   *
+   *
+   * <pre>
+   * The request is denied because it contains credential with type that is
+   * unsupported.
+   *
+   * Example of an ErrorInfo when the request contains an unsupported credential
+   * type for service `storage.googleapis.com`.
+   *
+   * {
+   * "reason": "CREDENTIAL_TYPE_UNSUPPORTED",
+   * "domain": "googleapis.com",
+   * "metadata": {
+   * "service": "storage.googleapis.com"
+   * }
+   * }
+   * </pre>
+   *
+   * <code>CREDENTIAL_TYPE_UNSUPPORTED = 43;</code>
+   */
+  public static final int CREDENTIAL_TYPE_UNSUPPORTED_VALUE = 43;
+
+  /**
+   *
+   *
+   * <pre>
+   * The request is denied because it contains unsupported account type.
+   *
+   * Example of an ErrorInfo when the request contains an unsupported account
+   * type for service `storage.googleapis.com`.
+   *
+   * {
+   * "reason": "ACCOUNT_TYPE_UNSUPPORTED",
+   * "domain": "googleapis.com",
+   * "metadata": {
+   * "service": "storage.googleapis.com"
+   * }
+   * }
+   * </pre>
+   *
+   * <code>ACCOUNT_TYPE_UNSUPPORTED = 44;</code>
+   */
+  public static final int ACCOUNT_TYPE_UNSUPPORTED_VALUE = 44;
+
+  /**
+   *
+   *
+   * <pre>
+   * The request is denied because the API endpoint is restricted by
+   * administrators according to the organization policy constraint.
+   * For more information see
+   * https://cloud.google.com/assured-workloads/docs/restrict-endpoint-usage.
+   *
+   * Example of an ErrorInfo when access to Google Cloud Storage service is
+   * restricted by Restrict Endpoint Usage policy:
+   *
+   * {
+   * "reason": "ENDPOINT_USAGE_RESTRICTION_VIOLATED",
+   * "domain": "googleapis.com/policies/endpointUsageRestriction",
+   * "metadata": {
+   * "policy_name": "constraints/gcp.restrictEndpointUsage",
+   * "checked_value": "storage.googleapis.com"
+   * "consumer": "organization/123"
+   * "service": "storage.googleapis.com"
+   * }
+   * }
+   * </pre>
+   *
+   * <code>ENDPOINT_USAGE_RESTRICTION_VIOLATED = 45;</code>
+   */
+  public static final int ENDPOINT_USAGE_RESTRICTION_VIOLATED_VALUE = 45;
+
+  /**
+   *
+   *
+   * <pre>
+   * The request is denied because the TLS Cipher Suite is restricted by
+   * administrators according to the organization policy constraint.
+   * For more information see
+   * https://cloud.google.com/assured-workloads/docs/restrict-tls-cipher-suites
+   *
+   * Example of an ErrorInfo when access to Google Cloud BigQuery service is
+   * restricted by Restrict TLS Cipher Suites policy:
+   *
+   * {
+   * "reason": "TLS_CIPHER_RESTRICTION_VIOLATED",
+   * "domain": "googleapis.com/policies/tlsCipherRestriction",
+   * "metadata": {
+   * "policy_name": "constraints/gcp.restrictTLSCipherSuites",
+   * "checked_value": "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
+   * "consumer": "organization/123"
+   * "service": "bigquery.googleapis.com"
+   * }
+   * }
+   * </pre>
+   *
+   * <code>TLS_CIPHER_RESTRICTION_VIOLATED = 46;</code>
+   */
+  public static final int TLS_CIPHER_RESTRICTION_VIOLATED_VALUE = 46;
+
+  /**
+   *
+   *
+   * <pre>
+   * The request is denied because the MCP activation check fails.
+   *
+   * Example of an ErrorInfo when the container "projects/123" contacting
+   * "pubsub.googleapis.com" service which is disabled by MCP:
+   *
+   * { "reason": "MCP_SERVER_DISABLED",
+   * "domain": "googleapis.com",
+   * "metadata": {
+   * "consumer": "projects/123",
+   * "service": "pubsub.googleapis.com"
+   * }
+   * }
+   *
+   * This response indicates the "pubsub.googleapis.com" has been disabled in
+   * "projects/123" for MCP.
+   * </pre>
+   *
+   * <code>MCP_SERVER_DISABLED = 47;</code>
+   */
+  public static final int MCP_SERVER_DISABLED_VALUE = 47;
+
   public final int getNumber() {
     if (this == UNRECOGNIZED) {
       throw new java.lang.IllegalArgumentException(
@@ -1812,6 +2347,28 @@ public static ErrorReason forNumber(int value) {
         return MISSING_ORIGIN;
       case 34:
         return OVERLOADED_CREDENTIALS;
+      case 35:
+        return LOCATION_ORG_POLICY_VIOLATED;
+      case 36:
+        return TLS_ORG_POLICY_VIOLATED;
+      case 38:
+        return EMULATOR_QUOTA_EXCEEDED;
+      case 39:
+        return CREDENTIAL_ANDROID_APP_INVALID;
+      case 41:
+        return IAM_PERMISSION_DENIED;
+      case 42:
+        return JWT_TOKEN_INVALID;
+      case 43:
+        return CREDENTIAL_TYPE_UNSUPPORTED;
+      case 44:
+        return ACCOUNT_TYPE_UNSUPPORTED;
+      case 45:
+        return ENDPOINT_USAGE_RESTRICTION_VIOLATED;
+      case 46:
+        return TLS_CIPHER_RESTRICTION_VIOLATED;
+      case 47:
+        return MCP_SERVER_DISABLED;
       default:
         return null;
     }
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/ErrorReasonProto.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/ErrorReasonProto.java
index 94f39f58ba..b49906b66f 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/ErrorReasonProto.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/ErrorReasonProto.java
@@ -49,7 +49,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
   static {
     java.lang.String[] descriptorData = {
       "\n\035google/api/error_reason.proto\022\ngoogle."
-          + "api*\272\007\n\013ErrorReason\022\034\n\030ERROR_REASON_UNSP"
+          + "api*\222\n\n\013ErrorReason\022\034\n\030ERROR_REASON_UNSP"
           + "ECIFIED\020\000\022\024\n\020SERVICE_DISABLED\020\001\022\024\n\020BILLI"
           + "NG_DISABLED\020\002\022\023\n\017API_KEY_INVALID\020\003\022\033\n\027AP"
           + "I_KEY_SERVICE_BLOCKED\020\004\022!\n\035API_KEY_HTTP_"
@@ -73,10 +73,18 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "\n\023SERVICE_NOT_VISIBLE\020\035\022\021\n\rGCP_SUSPENDED"
           + "\020\036\022\034\n\030LOCATION_POLICY_VIOLATED\020\037\022\022\n\016MISS"
           + "ING_ORIGIN\020!\022\032\n\026OVERLOADED_CREDENTIALS\020\""
-          + "Bp\n\016com.google.apiB\020ErrorReasonProtoP\001ZC"
-          + "google.golang.org/genproto/googleapis/ap"
-          + "i/error_reason;error_reason\242\002\004GAPIb\006prot"
-          + "o3"
+          + "\022 \n\034LOCATION_ORG_POLICY_VIOLATED\020#\022\033\n\027TL"
+          + "S_ORG_POLICY_VIOLATED\020$\022\033\n\027EMULATOR_QUOT"
+          + "A_EXCEEDED\020&\022\"\n\036CREDENTIAL_ANDROID_APP_I"
+          + "NVALID\020\'\022\031\n\025IAM_PERMISSION_DENIED\020)\022\025\n\021J"
+          + "WT_TOKEN_INVALID\020*\022\037\n\033CREDENTIAL_TYPE_UN"
+          + "SUPPORTED\020+\022\034\n\030ACCOUNT_TYPE_UNSUPPORTED\020"
+          + ",\022\'\n#ENDPOINT_USAGE_RESTRICTION_VIOLATED"
+          + "\020-\022#\n\037TLS_CIPHER_RESTRICTION_VIOLATED\020.\022"
+          + "\027\n\023MCP_SERVER_DISABLED\020/Bp\n\016com.google.a"
+          + "piB\020ErrorReasonProtoP\001ZCgoogle.golang.or"
+          + "g/genproto/googleapis/api/error_reason;e"
+          + "rror_reason\242\002\004GAPIb\006proto3"
     };
     descriptor =
         com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/FlowControlLimitExceededBehaviorProto.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/FlowControlLimitExceededBehaviorProto.java
new file mode 100644
index 0000000000..b22978eb3f
--- /dev/null
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/FlowControlLimitExceededBehaviorProto.java
@@ -0,0 +1,219 @@
+/*
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// NO CHECKED-IN PROTOBUF GENCODE
+// source: google/api/client.proto
+// Protobuf Java Version: 4.33.2
+
+package com.google.api;
+
+/**
+ *
+ *
+ * <pre>
+ * The behavior to take when the flow control limit is exceeded.
+ * </pre>
+ *
+ * Protobuf enum {@code google.api.FlowControlLimitExceededBehaviorProto}
+ */
+@com.google.protobuf.Generated
+public enum FlowControlLimitExceededBehaviorProto
+    implements com.google.protobuf.ProtocolMessageEnum {
+  /**
+   *
+   *
+   * <pre>
+   * Default behavior, system-defined.
+   * </pre>
+   *
+   * <code>UNSET_BEHAVIOR = 0;</code>
+   */
+  UNSET_BEHAVIOR(0),
+  /**
+   *
+   *
+   * <pre>
+   * Stop operation, raise error.
+   * </pre>
+   *
+   * <code>THROW_EXCEPTION = 1;</code>
+   */
+  THROW_EXCEPTION(1),
+  /**
+   *
+   *
+   * <pre>
+   * Pause operation until limit clears.
+   * </pre>
+   *
+   * <code>BLOCK = 2;</code>
+   */
+  BLOCK(2),
+  /**
+   *
+   *
+   * <pre>
+   * Continue operation, disregard limit.
+   * </pre>
+   *
+   * <code>IGNORE = 3;</code>
+   */
+  IGNORE(3),
+  UNRECOGNIZED(-1),
+  ;
+
+  static {
+    com.google.protobuf.RuntimeVersion.validateProtobufGencodeVersion(
+        com.google.protobuf.RuntimeVersion.RuntimeDomain.PUBLIC,
+        /* major= */ 4,
+        /* minor= */ 33,
+        /* patch= */ 2,
+        /* suffix= */ "",
+        "FlowControlLimitExceededBehaviorProto");
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * Default behavior, system-defined.
+   * </pre>
+   *
+   * <code>UNSET_BEHAVIOR = 0;</code>
+   */
+  public static final int UNSET_BEHAVIOR_VALUE = 0;
+
+  /**
+   *
+   *
+   * <pre>
+   * Stop operation, raise error.
+   * </pre>
+   *
+   * <code>THROW_EXCEPTION = 1;</code>
+   */
+  public static final int THROW_EXCEPTION_VALUE = 1;
+
+  /**
+   *
+   *
+   * <pre>
+   * Pause operation until limit clears.
+   * </pre>
+   *
+   * <code>BLOCK = 2;</code>
+   */
+  public static final int BLOCK_VALUE = 2;
+
+  /**
+   *
+   *
+   * <pre>
+   * Continue operation, disregard limit.
+   * </pre>
+   *
+   * <code>IGNORE = 3;</code>
+   */
+  public static final int IGNORE_VALUE = 3;
+
+  public final int getNumber() {
+    if (this == UNRECOGNIZED) {
+      throw new java.lang.IllegalArgumentException(
+          "Can't get the number of an unknown enum value.");
+    }
+    return value;
+  }
+
+  /**
+   * @param value The numeric wire value of the corresponding enum entry.
+   * @return The enum associated with the given numeric wire value.
+   * @deprecated Use {@link #forNumber(int)} instead.
+   */
+  @java.lang.Deprecated
+  public static FlowControlLimitExceededBehaviorProto valueOf(int value) {
+    return forNumber(value);
+  }
+
+  /**
+   * @param value The numeric wire value of the corresponding enum entry.
+   * @return The enum associated with the given numeric wire value.
+   */
+  public static FlowControlLimitExceededBehaviorProto forNumber(int value) {
+    switch (value) {
+      case 0:
+        return UNSET_BEHAVIOR;
+      case 1:
+        return THROW_EXCEPTION;
+      case 2:
+        return BLOCK;
+      case 3:
+        return IGNORE;
+      default:
+        return null;
+    }
+  }
+
+  public static com.google.protobuf.Internal.EnumLiteMap<FlowControlLimitExceededBehaviorProto>
+      internalGetValueMap() {
+    return internalValueMap;
+  }
+
+  private static final com.google.protobuf.Internal.EnumLiteMap<
+          FlowControlLimitExceededBehaviorProto>
+      internalValueMap =
+          new com.google.protobuf.Internal.EnumLiteMap<FlowControlLimitExceededBehaviorProto>() {
+            public FlowControlLimitExceededBehaviorProto findValueByNumber(int number) {
+              return FlowControlLimitExceededBehaviorProto.forNumber(number);
+            }
+          };
+
+  public final com.google.protobuf.Descriptors.EnumValueDescriptor getValueDescriptor() {
+    if (this == UNRECOGNIZED) {
+      throw new java.lang.IllegalStateException(
+          "Can't get the descriptor of an unrecognized enum value.");
+    }
+    return getDescriptor().getValues().get(ordinal());
+  }
+
+  public final com.google.protobuf.Descriptors.EnumDescriptor getDescriptorForType() {
+    return getDescriptor();
+  }
+
+  public static com.google.protobuf.Descriptors.EnumDescriptor getDescriptor() {
+    return com.google.api.ClientProto.getDescriptor().getEnumTypes().get(2);
+  }
+
+  private static final FlowControlLimitExceededBehaviorProto[] VALUES = values();
+
+  public static FlowControlLimitExceededBehaviorProto valueOf(
+      com.google.protobuf.Descriptors.EnumValueDescriptor desc) {
+    if (desc.getType() != getDescriptor()) {
+      throw new java.lang.IllegalArgumentException("EnumValueDescriptor is not for this type.");
+    }
+    if (desc.getIndex() == -1) {
+      return UNRECOGNIZED;
+    }
+    return VALUES[desc.getIndex()];
+  }
+
+  private final int value;
+
+  private FlowControlLimitExceededBehaviorProto(int value) {
+    this.value = value;
+  }
+
+  // @@protoc_insertion_point(enum_scope:google.api.FlowControlLimitExceededBehaviorProto)
+}
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/GoSettings.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/GoSettings.java
index 54f2d59f5c..42989dc49d 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/GoSettings.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/GoSettings.java
@@ -164,6 +164,8 @@ public int getRenamedServicesCount() {
    * service names and values are the name to be used for the service client
    * and call options.
    *
+   * Example:
+   *
    * publishing:
    * go_settings:
    * renamed_services:
@@ -195,6 +197,8 @@ public java.util.Map<java.lang.String, java.lang.String> getRenamedServices() {
    * service names and values are the name to be used for the service client
    * and call options.
    *
+   * Example:
+   *
    * publishing:
    * go_settings:
    * renamed_services:
@@ -216,6 +220,8 @@ public java.util.Map<java.lang.String, java.lang.String> getRenamedServicesMap()
    * service names and values are the name to be used for the service client
    * and call options.
    *
+   * Example:
+   *
    * publishing:
    * go_settings:
    * renamed_services:
@@ -244,6 +250,8 @@ public java.util.Map<java.lang.String, java.lang.String> getRenamedServicesMap()
    * service names and values are the name to be used for the service client
    * and call options.
    *
+   * Example:
+   *
    * publishing:
    * go_settings:
    * renamed_services:
@@ -875,6 +883,8 @@ public int getRenamedServicesCount() {
      * service names and values are the name to be used for the service client
      * and call options.
      *
+     * Example:
+     *
      * publishing:
      * go_settings:
      * renamed_services:
@@ -906,6 +916,8 @@ public java.util.Map<java.lang.String, java.lang.String> getRenamedServices() {
      * service names and values are the name to be used for the service client
      * and call options.
      *
+     * Example:
+     *
      * publishing:
      * go_settings:
      * renamed_services:
@@ -927,6 +939,8 @@ public java.util.Map<java.lang.String, java.lang.String> getRenamedServicesMap()
      * service names and values are the name to be used for the service client
      * and call options.
      *
+     * Example:
+     *
      * publishing:
      * go_settings:
      * renamed_services:
@@ -955,6 +969,8 @@ public java.util.Map<java.lang.String, java.lang.String> getRenamedServicesMap()
      * service names and values are the name to be used for the service client
      * and call options.
      *
+     * Example:
+     *
      * publishing:
      * go_settings:
      * renamed_services:
@@ -989,6 +1005,8 @@ public Builder clearRenamedServices() {
      * service names and values are the name to be used for the service client
      * and call options.
      *
+     * Example:
+     *
      * publishing:
      * go_settings:
      * renamed_services:
@@ -1020,6 +1038,8 @@ public java.util.Map<java.lang.String, java.lang.String> getMutableRenamedServic
      * service names and values are the name to be used for the service client
      * and call options.
      *
+     * Example:
+     *
      * publishing:
      * go_settings:
      * renamed_services:
@@ -1048,6 +1068,8 @@ public Builder putRenamedServices(java.lang.String key, java.lang.String value)
      * service names and values are the name to be used for the service client
      * and call options.
      *
+     * Example:
+     *
      * publishing:
      * go_settings:
      * renamed_services:
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/GoSettingsOrBuilder.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/GoSettingsOrBuilder.java
index c978320ae6..727901521f 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/GoSettingsOrBuilder.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/GoSettingsOrBuilder.java
@@ -71,6 +71,8 @@ public interface GoSettingsOrBuilder
    * service names and values are the name to be used for the service client
    * and call options.
    *
+   * Example:
+   *
    * publishing:
    * go_settings:
    * renamed_services:
@@ -89,6 +91,8 @@ public interface GoSettingsOrBuilder
    * service names and values are the name to be used for the service client
    * and call options.
    *
+   * Example:
+   *
    * publishing:
    * go_settings:
    * renamed_services:
@@ -111,6 +115,8 @@ public interface GoSettingsOrBuilder
    * service names and values are the name to be used for the service client
    * and call options.
    *
+   * Example:
+   *
    * publishing:
    * go_settings:
    * renamed_services:
@@ -129,6 +135,8 @@ public interface GoSettingsOrBuilder
    * service names and values are the name to be used for the service client
    * and call options.
    *
+   * Example:
+   *
    * publishing:
    * go_settings:
    * renamed_services:
@@ -151,6 +159,8 @@ java.lang.String getRenamedServicesOrDefault(
    * service names and values are the name to be used for the service client
    * and call options.
    *
+   * Example:
+   *
    * publishing:
    * go_settings:
    * renamed_services:
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/JavaSettings.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/JavaSettings.java
index 6617042ef6..7a7d363d8d 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/JavaSettings.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/JavaSettings.java
@@ -98,6 +98,7 @@ protected com.google.protobuf.MapFieldReflectionAccessor internalGetMapFieldRefl
    * Example of a YAML configuration::
    *
    * publishing:
+   * library_settings:
    * java_settings:
    * library_package: com.google.cloud.pubsub.v1
    * </pre>
@@ -132,6 +133,7 @@ public java.lang.String getLibraryPackage() {
    * Example of a YAML configuration::
    *
    * publishing:
+   * library_settings:
    * java_settings:
    * library_package: com.google.cloud.pubsub.v1
    * </pre>
@@ -785,6 +787,7 @@ public Builder mergeFrom(
      * Example of a YAML configuration::
      *
      * publishing:
+     * library_settings:
      * java_settings:
      * library_package: com.google.cloud.pubsub.v1
      * </pre>
@@ -818,6 +821,7 @@ public java.lang.String getLibraryPackage() {
      * Example of a YAML configuration::
      *
      * publishing:
+     * library_settings:
      * java_settings:
      * library_package: com.google.cloud.pubsub.v1
      * </pre>
@@ -851,6 +855,7 @@ public com.google.protobuf.ByteString getLibraryPackageBytes() {
      * Example of a YAML configuration::
      *
      * publishing:
+     * library_settings:
      * java_settings:
      * library_package: com.google.cloud.pubsub.v1
      * </pre>
@@ -883,6 +888,7 @@ public Builder setLibraryPackage(java.lang.String value) {
      * Example of a YAML configuration::
      *
      * publishing:
+     * library_settings:
      * java_settings:
      * library_package: com.google.cloud.pubsub.v1
      * </pre>
@@ -911,6 +917,7 @@ public Builder clearLibraryPackage() {
      * Example of a YAML configuration::
      *
      * publishing:
+     * library_settings:
      * java_settings:
      * library_package: com.google.cloud.pubsub.v1
      * </pre>
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/JavaSettingsOrBuilder.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/JavaSettingsOrBuilder.java
index 1ae94c7bbc..fde5cf3b13 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/JavaSettingsOrBuilder.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/JavaSettingsOrBuilder.java
@@ -39,6 +39,7 @@ public interface JavaSettingsOrBuilder
    * Example of a YAML configuration::
    *
    * publishing:
+   * library_settings:
    * java_settings:
    * library_package: com.google.cloud.pubsub.v1
    * </pre>
@@ -62,6 +63,7 @@ public interface JavaSettingsOrBuilder
    * Example of a YAML configuration::
    *
    * publishing:
+   * library_settings:
    * java_settings:
    * library_package: com.google.cloud.pubsub.v1
    * </pre>
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/MethodSettings.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/MethodSettings.java
index 34c86cd18e..ca4daec9dc 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/MethodSettings.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/MethodSettings.java
@@ -1874,6 +1874,85 @@ public com.google.protobuf.ByteString getAutoPopulatedFieldsBytes(int index) {
     return autoPopulatedFields_.getByteString(index);
   }
 
+  public static final int BATCHING_FIELD_NUMBER = 4;
+  private com.google.api.BatchingConfigProto batching_;
+
+  /**
+   *
+   *
+   * <pre>
+   * Batching configuration for an API method in client libraries.
+   *
+   * Example of a YAML configuration:
+   *
+   * publishing:
+   * method_settings:
+   * - selector: google.example.v1.ExampleService.BatchCreateExample
+   * batching:
+   * element_count_threshold: 1000
+   * request_byte_threshold: 100000000
+   * delay_threshold_millis: 10
+   * </pre>
+   *
+   * <code>.google.api.BatchingConfigProto batching = 4;</code>
+   *
+   * @return Whether the batching field is set.
+   */
+  @java.lang.Override
+  public boolean hasBatching() {
+    return ((bitField0_ & 0x00000002) != 0);
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * Batching configuration for an API method in client libraries.
+   *
+   * Example of a YAML configuration:
+   *
+   * publishing:
+   * method_settings:
+   * - selector: google.example.v1.ExampleService.BatchCreateExample
+   * batching:
+   * element_count_threshold: 1000
+   * request_byte_threshold: 100000000
+   * delay_threshold_millis: 10
+   * </pre>
+   *
+   * <code>.google.api.BatchingConfigProto batching = 4;</code>
+   *
+   * @return The batching.
+   */
+  @java.lang.Override
+  public com.google.api.BatchingConfigProto getBatching() {
+    return batching_ == null ? com.google.api.BatchingConfigProto.getDefaultInstance() : batching_;
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * Batching configuration for an API method in client libraries.
+   *
+   * Example of a YAML configuration:
+   *
+   * publishing:
+   * method_settings:
+   * - selector: google.example.v1.ExampleService.BatchCreateExample
+   * batching:
+   * element_count_threshold: 1000
+   * request_byte_threshold: 100000000
+   * delay_threshold_millis: 10
+   * </pre>
+   *
+   * <code>.google.api.BatchingConfigProto batching = 4;</code>
+   */
+  @java.lang.Override
+  public com.google.api.BatchingConfigProtoOrBuilder getBatchingOrBuilder() {
+    return batching_ == null ? com.google.api.BatchingConfigProto.getDefaultInstance() : batching_;
+  }
+
   private byte memoizedIsInitialized = -1;
 
   @java.lang.Override
@@ -1897,6 +1976,9 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     for (int i = 0; i < autoPopulatedFields_.size(); i++) {
       com.google.protobuf.GeneratedMessage.writeString(output, 3, autoPopulatedFields_.getRaw(i));
     }
+    if (((bitField0_ & 0x00000002) != 0)) {
+      output.writeMessage(4, getBatching());
+    }
     getUnknownFields().writeTo(output);
   }
 
@@ -1920,6 +2002,9 @@ public int getSerializedSize() {
       size += dataSize;
       size += 1 * getAutoPopulatedFieldsList().size();
     }
+    if (((bitField0_ & 0x00000002) != 0)) {
+      size += com.google.protobuf.CodedOutputStream.computeMessageSize(4, getBatching());
+    }
     size += getUnknownFields().getSerializedSize();
     memoizedSize = size;
     return size;
@@ -1941,6 +2026,10 @@ public boolean equals(final java.lang.Object obj) {
       if (!getLongRunning().equals(other.getLongRunning())) return false;
     }
     if (!getAutoPopulatedFieldsList().equals(other.getAutoPopulatedFieldsList())) return false;
+    if (hasBatching() != other.hasBatching()) return false;
+    if (hasBatching()) {
+      if (!getBatching().equals(other.getBatching())) return false;
+    }
     if (!getUnknownFields().equals(other.getUnknownFields())) return false;
     return true;
   }
@@ -1962,6 +2051,10 @@ public int hashCode() {
       hash = (37 * hash) + AUTO_POPULATED_FIELDS_FIELD_NUMBER;
       hash = (53 * hash) + getAutoPopulatedFieldsList().hashCode();
     }
+    if (hasBatching()) {
+      hash = (37 * hash) + BATCHING_FIELD_NUMBER;
+      hash = (53 * hash) + getBatching().hashCode();
+    }
     hash = (29 * hash) + getUnknownFields().hashCode();
     memoizedHashCode = hash;
     return hash;
@@ -2100,6 +2193,7 @@ private Builder(com.google.protobuf.GeneratedMessage.BuilderParent parent) {
     private void maybeForceBuilderInitialization() {
       if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
         internalGetLongRunningFieldBuilder();
+        internalGetBatchingFieldBuilder();
       }
     }
 
@@ -2114,6 +2208,11 @@ public Builder clear() {
         longRunningBuilder_ = null;
       }
       autoPopulatedFields_ = com.google.protobuf.LazyStringArrayList.emptyList();
+      batching_ = null;
+      if (batchingBuilder_ != null) {
+        batchingBuilder_.dispose();
+        batchingBuilder_ = null;
+      }
       return this;
     }
 
@@ -2161,6 +2260,10 @@ private void buildPartial0(com.google.api.MethodSettings result) {
         autoPopulatedFields_.makeImmutable();
         result.autoPopulatedFields_ = autoPopulatedFields_;
       }
+      if (((from_bitField0_ & 0x00000008) != 0)) {
+        result.batching_ = batchingBuilder_ == null ? batching_ : batchingBuilder_.build();
+        to_bitField0_ |= 0x00000002;
+      }
       result.bitField0_ |= to_bitField0_;
     }
 
@@ -2194,6 +2297,9 @@ public Builder mergeFrom(com.google.api.MethodSettings other) {
         }
         onChanged();
       }
+      if (other.hasBatching()) {
+        mergeBatching(other.getBatching());
+      }
       this.mergeUnknownFields(other.getUnknownFields());
       onChanged();
       return this;
@@ -2240,6 +2346,13 @@ public Builder mergeFrom(
                 autoPopulatedFields_.add(s);
                 break;
               } // case 26
+            case 34:
+              {
+                input.readMessage(
+                    internalGetBatchingFieldBuilder().getBuilder(), extensionRegistry);
+                bitField0_ |= 0x00000008;
+                break;
+              } // case 34
             default:
               {
                 if (!super.parseUnknownField(input, extensionRegistry, tag)) {
@@ -2995,6 +3108,290 @@ public Builder addAutoPopulatedFieldsBytes(com.google.protobuf.ByteString value)
       return this;
     }
 
+    private com.google.api.BatchingConfigProto batching_;
+    private com.google.protobuf.SingleFieldBuilder<
+            com.google.api.BatchingConfigProto,
+            com.google.api.BatchingConfigProto.Builder,
+            com.google.api.BatchingConfigProtoOrBuilder>
+        batchingBuilder_;
+
+    /**
+     *
+     *
+     * <pre>
+     * Batching configuration for an API method in client libraries.
+     *
+     * Example of a YAML configuration:
+     *
+     * publishing:
+     * method_settings:
+     * - selector: google.example.v1.ExampleService.BatchCreateExample
+     * batching:
+     * element_count_threshold: 1000
+     * request_byte_threshold: 100000000
+     * delay_threshold_millis: 10
+     * </pre>
+     *
+     * <code>.google.api.BatchingConfigProto batching = 4;</code>
+     *
+     * @return Whether the batching field is set.
+     */
+    public boolean hasBatching() {
+      return ((bitField0_ & 0x00000008) != 0);
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Batching configuration for an API method in client libraries.
+     *
+     * Example of a YAML configuration:
+     *
+     * publishing:
+     * method_settings:
+     * - selector: google.example.v1.ExampleService.BatchCreateExample
+     * batching:
+     * element_count_threshold: 1000
+     * request_byte_threshold: 100000000
+     * delay_threshold_millis: 10
+     * </pre>
+     *
+     * <code>.google.api.BatchingConfigProto batching = 4;</code>
+     *
+     * @return The batching.
+     */
+    public com.google.api.BatchingConfigProto getBatching() {
+      if (batchingBuilder_ == null) {
+        return batching_ == null
+            ? com.google.api.BatchingConfigProto.getDefaultInstance()
+            : batching_;
+      } else {
+        return batchingBuilder_.getMessage();
+      }
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Batching configuration for an API method in client libraries.
+     *
+     * Example of a YAML configuration:
+     *
+     * publishing:
+     * method_settings:
+     * - selector: google.example.v1.ExampleService.BatchCreateExample
+     * batching:
+     * element_count_threshold: 1000
+     * request_byte_threshold: 100000000
+     * delay_threshold_millis: 10
+     * </pre>
+     *
+     * <code>.google.api.BatchingConfigProto batching = 4;</code>
+     */
+    public Builder setBatching(com.google.api.BatchingConfigProto value) {
+      if (batchingBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        batching_ = value;
+      } else {
+        batchingBuilder_.setMessage(value);
+      }
+      bitField0_ |= 0x00000008;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Batching configuration for an API method in client libraries.
+     *
+     * Example of a YAML configuration:
+     *
+     * publishing:
+     * method_settings:
+     * - selector: google.example.v1.ExampleService.BatchCreateExample
+     * batching:
+     * element_count_threshold: 1000
+     * request_byte_threshold: 100000000
+     * delay_threshold_millis: 10
+     * </pre>
+     *
+     * <code>.google.api.BatchingConfigProto batching = 4;</code>
+     */
+    public Builder setBatching(com.google.api.BatchingConfigProto.Builder builderForValue) {
+      if (batchingBuilder_ == null) {
+        batching_ = builderForValue.build();
+      } else {
+        batchingBuilder_.setMessage(builderForValue.build());
+      }
+      bitField0_ |= 0x00000008;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Batching configuration for an API method in client libraries.
+     *
+     * Example of a YAML configuration:
+     *
+     * publishing:
+     * method_settings:
+     * - selector: google.example.v1.ExampleService.BatchCreateExample
+     * batching:
+     * element_count_threshold: 1000
+     * request_byte_threshold: 100000000
+     * delay_threshold_millis: 10
+     * </pre>
+     *
+     * <code>.google.api.BatchingConfigProto batching = 4;</code>
+     */
+    public Builder mergeBatching(com.google.api.BatchingConfigProto value) {
+      if (batchingBuilder_ == null) {
+        if (((bitField0_ & 0x00000008) != 0)
+            && batching_ != null
+            && batching_ != com.google.api.BatchingConfigProto.getDefaultInstance()) {
+          getBatchingBuilder().mergeFrom(value);
+        } else {
+          batching_ = value;
+        }
+      } else {
+        batchingBuilder_.mergeFrom(value);
+      }
+      if (batching_ != null) {
+        bitField0_ |= 0x00000008;
+        onChanged();
+      }
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Batching configuration for an API method in client libraries.
+     *
+     * Example of a YAML configuration:
+     *
+     * publishing:
+     * method_settings:
+     * - selector: google.example.v1.ExampleService.BatchCreateExample
+     * batching:
+     * element_count_threshold: 1000
+     * request_byte_threshold: 100000000
+     * delay_threshold_millis: 10
+     * </pre>
+     *
+     * <code>.google.api.BatchingConfigProto batching = 4;</code>
+     */
+    public Builder clearBatching() {
+      bitField0_ = (bitField0_ & ~0x00000008);
+      batching_ = null;
+      if (batchingBuilder_ != null) {
+        batchingBuilder_.dispose();
+        batchingBuilder_ = null;
+      }
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Batching configuration for an API method in client libraries.
+     *
+     * Example of a YAML configuration:
+     *
+     * publishing:
+     * method_settings:
+     * - selector: google.example.v1.ExampleService.BatchCreateExample
+     * batching:
+     * element_count_threshold: 1000
+     * request_byte_threshold: 100000000
+     * delay_threshold_millis: 10
+     * </pre>
+     *
+     * <code>.google.api.BatchingConfigProto batching = 4;</code>
+     */
+    public com.google.api.BatchingConfigProto.Builder getBatchingBuilder() {
+      bitField0_ |= 0x00000008;
+      onChanged();
+      return internalGetBatchingFieldBuilder().getBuilder();
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Batching configuration for an API method in client libraries.
+     *
+     * Example of a YAML configuration:
+     *
+     * publishing:
+     * method_settings:
+     * - selector: google.example.v1.ExampleService.BatchCreateExample
+     * batching:
+     * element_count_threshold: 1000
+     * request_byte_threshold: 100000000
+     * delay_threshold_millis: 10
+     * </pre>
+     *
+     * <code>.google.api.BatchingConfigProto batching = 4;</code>
+     */
+    public com.google.api.BatchingConfigProtoOrBuilder getBatchingOrBuilder() {
+      if (batchingBuilder_ != null) {
+        return batchingBuilder_.getMessageOrBuilder();
+      } else {
+        return batching_ == null
+            ? com.google.api.BatchingConfigProto.getDefaultInstance()
+            : batching_;
+      }
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * Batching configuration for an API method in client libraries.
+     *
+     * Example of a YAML configuration:
+     *
+     * publishing:
+     * method_settings:
+     * - selector: google.example.v1.ExampleService.BatchCreateExample
+     * batching:
+     * element_count_threshold: 1000
+     * request_byte_threshold: 100000000
+     * delay_threshold_millis: 10
+     * </pre>
+     *
+     * <code>.google.api.BatchingConfigProto batching = 4;</code>
+     */
+    private com.google.protobuf.SingleFieldBuilder<
+            com.google.api.BatchingConfigProto,
+            com.google.api.BatchingConfigProto.Builder,
+            com.google.api.BatchingConfigProtoOrBuilder>
+        internalGetBatchingFieldBuilder() {
+      if (batchingBuilder_ == null) {
+        batchingBuilder_ =
+            new com.google.protobuf.SingleFieldBuilder<
+                com.google.api.BatchingConfigProto,
+                com.google.api.BatchingConfigProto.Builder,
+                com.google.api.BatchingConfigProtoOrBuilder>(
+                getBatching(), getParentForChildren(), isClean());
+        batching_ = null;
+      }
+      return batchingBuilder_;
+    }
+
     // @@protoc_insertion_point(builder_scope:google.api.MethodSettings)
   }
 
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/MethodSettingsOrBuilder.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/MethodSettingsOrBuilder.java
index 90c24d2333..fa778fe082 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/MethodSettingsOrBuilder.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/MethodSettingsOrBuilder.java
@@ -237,4 +237,71 @@ public interface MethodSettingsOrBuilder
    * @return The bytes of the autoPopulatedFields at the given index.
    */
   com.google.protobuf.ByteString getAutoPopulatedFieldsBytes(int index);
+
+  /**
+   *
+   *
+   * <pre>
+   * Batching configuration for an API method in client libraries.
+   *
+   * Example of a YAML configuration:
+   *
+   * publishing:
+   * method_settings:
+   * - selector: google.example.v1.ExampleService.BatchCreateExample
+   * batching:
+   * element_count_threshold: 1000
+   * request_byte_threshold: 100000000
+   * delay_threshold_millis: 10
+   * </pre>
+   *
+   * <code>.google.api.BatchingConfigProto batching = 4;</code>
+   *
+   * @return Whether the batching field is set.
+   */
+  boolean hasBatching();
+
+  /**
+   *
+   *
+   * <pre>
+   * Batching configuration for an API method in client libraries.
+   *
+   * Example of a YAML configuration:
+   *
+   * publishing:
+   * method_settings:
+   * - selector: google.example.v1.ExampleService.BatchCreateExample
+   * batching:
+   * element_count_threshold: 1000
+   * request_byte_threshold: 100000000
+   * delay_threshold_millis: 10
+   * </pre>
+   *
+   * <code>.google.api.BatchingConfigProto batching = 4;</code>
+   *
+   * @return The batching.
+   */
+  com.google.api.BatchingConfigProto getBatching();
+
+  /**
+   *
+   *
+   * <pre>
+   * Batching configuration for an API method in client libraries.
+   *
+   * Example of a YAML configuration:
+   *
+   * publishing:
+   * method_settings:
+   * - selector: google.example.v1.ExampleService.BatchCreateExample
+   * batching:
+   * element_count_threshold: 1000
+   * request_byte_threshold: 100000000
+   * delay_threshold_millis: 10
+   * </pre>
+   *
+   * <code>.google.api.BatchingConfigProto batching = 4;</code>
+   */
+  com.google.api.BatchingConfigProtoOrBuilder getBatchingOrBuilder();
 }
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/OAuthRequirements.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/OAuthRequirements.java
index 75b6bc9058..44e3f4351f 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/OAuthRequirements.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/OAuthRequirements.java
@@ -96,6 +96,7 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    * The list of publicly documented OAuth scopes that are allowed access. An
    * OAuth token containing any of these scopes will be accepted.
    *
+   *
    * Example:
    *
    * canonical_scopes: https://www.googleapis.com/auth/calendar,
@@ -126,6 +127,7 @@ public java.lang.String getCanonicalScopes() {
    * The list of publicly documented OAuth scopes that are allowed access. An
    * OAuth token containing any of these scopes will be accepted.
    *
+   *
    * Example:
    *
    * canonical_scopes: https://www.googleapis.com/auth/calendar,
@@ -479,6 +481,7 @@ public Builder mergeFrom(
      * The list of publicly documented OAuth scopes that are allowed access. An
      * OAuth token containing any of these scopes will be accepted.
      *
+     *
      * Example:
      *
      * canonical_scopes: https://www.googleapis.com/auth/calendar,
@@ -508,6 +511,7 @@ public java.lang.String getCanonicalScopes() {
      * The list of publicly documented OAuth scopes that are allowed access. An
      * OAuth token containing any of these scopes will be accepted.
      *
+     *
      * Example:
      *
      * canonical_scopes: https://www.googleapis.com/auth/calendar,
@@ -537,6 +541,7 @@ public com.google.protobuf.ByteString getCanonicalScopesBytes() {
      * The list of publicly documented OAuth scopes that are allowed access. An
      * OAuth token containing any of these scopes will be accepted.
      *
+     *
      * Example:
      *
      * canonical_scopes: https://www.googleapis.com/auth/calendar,
@@ -565,6 +570,7 @@ public Builder setCanonicalScopes(java.lang.String value) {
      * The list of publicly documented OAuth scopes that are allowed access. An
      * OAuth token containing any of these scopes will be accepted.
      *
+     *
      * Example:
      *
      * canonical_scopes: https://www.googleapis.com/auth/calendar,
@@ -589,6 +595,7 @@ public Builder clearCanonicalScopes() {
      * The list of publicly documented OAuth scopes that are allowed access. An
      * OAuth token containing any of these scopes will be accepted.
      *
+     *
      * Example:
      *
      * canonical_scopes: https://www.googleapis.com/auth/calendar,
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/OAuthRequirementsOrBuilder.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/OAuthRequirementsOrBuilder.java
index 70c7e2c7d7..4b28739976 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/OAuthRequirementsOrBuilder.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/OAuthRequirementsOrBuilder.java
@@ -33,6 +33,7 @@ public interface OAuthRequirementsOrBuilder
    * The list of publicly documented OAuth scopes that are allowed access. An
    * OAuth token containing any of these scopes will be accepted.
    *
+   *
    * Example:
    *
    * canonical_scopes: https://www.googleapis.com/auth/calendar,
@@ -52,6 +53,7 @@ public interface OAuthRequirementsOrBuilder
    * The list of publicly documented OAuth scopes that are allowed access. An
    * OAuth token containing any of these scopes will be accepted.
    *
+   *
    * Example:
    *
    * canonical_scopes: https://www.googleapis.com/auth/calendar,
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/PhpSettings.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/PhpSettings.java
index eff8b20b9e..9f1787c4ad 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/PhpSettings.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/PhpSettings.java
@@ -51,7 +51,9 @@ private PhpSettings(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
     super(builder);
   }
 
-  private PhpSettings() {}
+  private PhpSettings() {
+    libraryPackage_ = "";
+  }
 
   public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
     return com.google.api.ClientProto.internal_static_google_api_PhpSettings_descriptor;
@@ -115,6 +117,81 @@ public com.google.api.CommonLanguageSettingsOrBuilder getCommonOrBuilder() {
     return common_ == null ? com.google.api.CommonLanguageSettings.getDefaultInstance() : common_;
   }
 
+  public static final int LIBRARY_PACKAGE_FIELD_NUMBER = 2;
+
+  @SuppressWarnings("serial")
+  private volatile java.lang.Object libraryPackage_ = "";
+
+  /**
+   *
+   *
+   * <pre>
+   * The package name to use in Php. Clobbers the php_namespace option
+   * set in the protobuf. This should be used **only** by APIs
+   * who have already set the language_settings.php.package_name" field
+   * in gapic.yaml. API teams should use the protobuf php_namespace option
+   * where possible.
+   *
+   * Example of a YAML configuration::
+   *
+   * publishing:
+   * library_settings:
+   * php_settings:
+   * library_package: Google&#92;Cloud&#92;PubSub&#92;V1
+   * </pre>
+   *
+   * <code>string library_package = 2;</code>
+   *
+   * @return The libraryPackage.
+   */
+  @java.lang.Override
+  public java.lang.String getLibraryPackage() {
+    java.lang.Object ref = libraryPackage_;
+    if (ref instanceof java.lang.String) {
+      return (java.lang.String) ref;
+    } else {
+      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+      java.lang.String s = bs.toStringUtf8();
+      libraryPackage_ = s;
+      return s;
+    }
+  }
+
+  /**
+   *
+   *
+   * <pre>
+   * The package name to use in Php. Clobbers the php_namespace option
+   * set in the protobuf. This should be used **only** by APIs
+   * who have already set the language_settings.php.package_name" field
+   * in gapic.yaml. API teams should use the protobuf php_namespace option
+   * where possible.
+   *
+   * Example of a YAML configuration::
+   *
+   * publishing:
+   * library_settings:
+   * php_settings:
+   * library_package: Google&#92;Cloud&#92;PubSub&#92;V1
+   * </pre>
+   *
+   * <code>string library_package = 2;</code>
+   *
+   * @return The bytes for libraryPackage.
+   */
+  @java.lang.Override
+  public com.google.protobuf.ByteString getLibraryPackageBytes() {
+    java.lang.Object ref = libraryPackage_;
+    if (ref instanceof java.lang.String) {
+      com.google.protobuf.ByteString b =
+          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+      libraryPackage_ = b;
+      return b;
+    } else {
+      return (com.google.protobuf.ByteString) ref;
+    }
+  }
+
   private byte memoizedIsInitialized = -1;
 
   @java.lang.Override
@@ -132,6 +209,9 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     if (((bitField0_ & 0x00000001) != 0)) {
       output.writeMessage(1, getCommon());
     }
+    if (!com.google.protobuf.GeneratedMessage.isStringEmpty(libraryPackage_)) {
+      com.google.protobuf.GeneratedMessage.writeString(output, 2, libraryPackage_);
+    }
     getUnknownFields().writeTo(output);
   }
 
@@ -144,6 +224,9 @@ public int getSerializedSize() {
     if (((bitField0_ & 0x00000001) != 0)) {
       size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, getCommon());
     }
+    if (!com.google.protobuf.GeneratedMessage.isStringEmpty(libraryPackage_)) {
+      size += com.google.protobuf.GeneratedMessage.computeStringSize(2, libraryPackage_);
+    }
     size += getUnknownFields().getSerializedSize();
     memoizedSize = size;
     return size;
@@ -163,6 +246,7 @@ public boolean equals(final java.lang.Object obj) {
     if (hasCommon()) {
       if (!getCommon().equals(other.getCommon())) return false;
     }
+    if (!getLibraryPackage().equals(other.getLibraryPackage())) return false;
     if (!getUnknownFields().equals(other.getUnknownFields())) return false;
     return true;
   }
@@ -178,6 +262,8 @@ public int hashCode() {
       hash = (37 * hash) + COMMON_FIELD_NUMBER;
       hash = (53 * hash) + getCommon().hashCode();
     }
+    hash = (37 * hash) + LIBRARY_PACKAGE_FIELD_NUMBER;
+    hash = (53 * hash) + getLibraryPackage().hashCode();
     hash = (29 * hash) + getUnknownFields().hashCode();
     memoizedHashCode = hash;
     return hash;
@@ -328,6 +414,7 @@ public Builder clear() {
         commonBuilder_.dispose();
         commonBuilder_ = null;
       }
+      libraryPackage_ = "";
       return this;
     }
 
@@ -367,6 +454,9 @@ private void buildPartial0(com.google.api.PhpSettings result) {
         result.common_ = commonBuilder_ == null ? common_ : commonBuilder_.build();
         to_bitField0_ |= 0x00000001;
       }
+      if (((from_bitField0_ & 0x00000002) != 0)) {
+        result.libraryPackage_ = libraryPackage_;
+      }
       result.bitField0_ |= to_bitField0_;
     }
 
@@ -385,6 +475,11 @@ public Builder mergeFrom(com.google.api.PhpSettings other) {
       if (other.hasCommon()) {
         mergeCommon(other.getCommon());
       }
+      if (!other.getLibraryPackage().isEmpty()) {
+        libraryPackage_ = other.libraryPackage_;
+        bitField0_ |= 0x00000002;
+        onChanged();
+      }
       this.mergeUnknownFields(other.getUnknownFields());
       onChanged();
       return this;
@@ -417,6 +512,12 @@ public Builder mergeFrom(
                 bitField0_ |= 0x00000001;
                 break;
               } // case 10
+            case 18:
+              {
+                libraryPackage_ = input.readStringRequireUtf8();
+                bitField0_ |= 0x00000002;
+                break;
+              } // case 18
             default:
               {
                 if (!super.parseUnknownField(input, extensionRegistry, tag)) {
@@ -630,6 +731,172 @@ public com.google.api.CommonLanguageSettingsOrBuilder getCommonOrBuilder() {
       return commonBuilder_;
     }
 
+    private java.lang.Object libraryPackage_ = "";
+
+    /**
+     *
+     *
+     * <pre>
+     * The package name to use in Php. Clobbers the php_namespace option
+     * set in the protobuf. This should be used **only** by APIs
+     * who have already set the language_settings.php.package_name" field
+     * in gapic.yaml. API teams should use the protobuf php_namespace option
+     * where possible.
+     *
+     * Example of a YAML configuration::
+     *
+     * publishing:
+     * library_settings:
+     * php_settings:
+     * library_package: Google&#92;Cloud&#92;PubSub&#92;V1
+     * </pre>
+     *
+     * <code>string library_package = 2;</code>
+     *
+     * @return The libraryPackage.
+     */
+    public java.lang.String getLibraryPackage() {
+      java.lang.Object ref = libraryPackage_;
+      if (!(ref instanceof java.lang.String)) {
+        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        libraryPackage_ = s;
+        return s;
+      } else {
+        return (java.lang.String) ref;
+      }
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The package name to use in Php. Clobbers the php_namespace option
+     * set in the protobuf. This should be used **only** by APIs
+     * who have already set the language_settings.php.package_name" field
+     * in gapic.yaml. API teams should use the protobuf php_namespace option
+     * where possible.
+     *
+     * Example of a YAML configuration::
+     *
+     * publishing:
+     * library_settings:
+     * php_settings:
+     * library_package: Google&#92;Cloud&#92;PubSub&#92;V1
+     * </pre>
+     *
+     * <code>string library_package = 2;</code>
+     *
+     * @return The bytes for libraryPackage.
+     */
+    public com.google.protobuf.ByteString getLibraryPackageBytes() {
+      java.lang.Object ref = libraryPackage_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b =
+            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
+        libraryPackage_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The package name to use in Php. Clobbers the php_namespace option
+     * set in the protobuf. This should be used **only** by APIs
+     * who have already set the language_settings.php.package_name" field
+     * in gapic.yaml. API teams should use the protobuf php_namespace option
+     * where possible.
+     *
+     * Example of a YAML configuration::
+     *
+     * publishing:
+     * library_settings:
+     * php_settings:
+     * library_package: Google&#92;Cloud&#92;PubSub&#92;V1
+     * </pre>
+     *
+     * <code>string library_package = 2;</code>
+     *
+     * @param value The libraryPackage to set.
+     * @return This builder for chaining.
+     */
+    public Builder setLibraryPackage(java.lang.String value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      libraryPackage_ = value;
+      bitField0_ |= 0x00000002;
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The package name to use in Php. Clobbers the php_namespace option
+     * set in the protobuf. This should be used **only** by APIs
+     * who have already set the language_settings.php.package_name" field
+     * in gapic.yaml. API teams should use the protobuf php_namespace option
+     * where possible.
+     *
+     * Example of a YAML configuration::
+     *
+     * publishing:
+     * library_settings:
+     * php_settings:
+     * library_package: Google&#92;Cloud&#92;PubSub&#92;V1
+     * </pre>
+     *
+     * <code>string library_package = 2;</code>
+     *
+     * @return This builder for chaining.
+     */
+    public Builder clearLibraryPackage() {
+      libraryPackage_ = getDefaultInstance().getLibraryPackage();
+      bitField0_ = (bitField0_ & ~0x00000002);
+      onChanged();
+      return this;
+    }
+
+    /**
+     *
+     *
+     * <pre>
+     * The package name to use in Php. Clobbers the php_namespace option
+     * set in the protobuf. This should be used **only** by APIs
+     * who have already set the language_settings.php.package_name" field
+     * in gapic.yaml. API teams should use the protobuf php_namespace option
+     * where possible.
+     *
+     * Example of a YAML configuration::
+     *
+     * publishing:
+     * library_settings:
+     * php_settings:
+     * library_package: Google&#92;Cloud&#92;PubSub&#92;V1
+     * </pre>
+     *
+     * <code>string library_package = 2;</code>
+     *
+     * @param value The bytes for libraryPackage to set.
+     * @return This builder for chaining.
+     */
+    public Builder setLibraryPackageBytes(com.google.protobuf.ByteString value) {
+      if (value == null) {
+        throw new NullPointerException();
+      }
+      checkByteStringIsUtf8(value);
+      libraryPackage_ = value;
+      bitField0_ |= 0x00000002;
+      onChanged();
+      return this;
+    }
+
     // @@protoc_insertion_point(builder_scope:google.api.PhpSettings)
   }
 
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/PhpSettingsOrBuilder.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/PhpSettingsOrBuilder.java
index bdb702f445..e67df67499 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/PhpSettingsOrBuilder.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/PhpSettingsOrBuilder.java
@@ -62,4 +62,52 @@ public interface PhpSettingsOrBuilder
    * <code>.google.api.CommonLanguageSettings common = 1;</code>
    */
   com.google.api.CommonLanguageSettingsOrBuilder getCommonOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * The package name to use in Php. Clobbers the php_namespace option
+   * set in the protobuf. This should be used **only** by APIs
+   * who have already set the language_settings.php.package_name" field
+   * in gapic.yaml. API teams should use the protobuf php_namespace option
+   * where possible.
+   *
+   * Example of a YAML configuration::
+   *
+   * publishing:
+   * library_settings:
+   * php_settings:
+   * library_package: Google&#92;Cloud&#92;PubSub&#92;V1
+   * </pre>
+   *
+   * <code>string library_package = 2;</code>
+   *
+   * @return The libraryPackage.
+   */
+  java.lang.String getLibraryPackage();
+
+  /**
+   *
+   *
+   * <pre>
+   * The package name to use in Php. Clobbers the php_namespace option
+   * set in the protobuf. This should be used **only** by APIs
+   * who have already set the language_settings.php.package_name" field
+   * in gapic.yaml. API teams should use the protobuf php_namespace option
+   * where possible.
+   *
+   * Example of a YAML configuration::
+   *
+   * publishing:
+   * library_settings:
+   * php_settings:
+   * library_package: Google&#92;Cloud&#92;PubSub&#92;V1
+   * </pre>
+   *
+   * <code>string library_package = 2;</code>
+   *
+   * @return The bytes for libraryPackage.
+   */
+  com.google.protobuf.ByteString getLibraryPackageBytes();
 }
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/RoutingRule.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/RoutingRule.java
index bc31392bb9..3ee0dda986 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/RoutingRule.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/RoutingRule.java
@@ -54,9 +54,13 @@
  * app_profile_id: profiles/prof_qux
  * }
  *
- * The routing header consists of one or multiple key-value pairs. Every key
- * and value must be percent-encoded, and joined together in the format of
- * `key1=value1&amp;key2=value2`.
+ * The routing header consists of one or multiple key-value pairs. The order of
+ * the key-value pairs is undefined, the order of the `routing_parameters` in
+ * the `RoutingRule` only matters for the evaluation order of the path
+ * templates when `field` is the same. See the examples below for more details.
+ *
+ * Every key and value in the routing header must be percent-encoded,
+ * and joined together in the following format: `key1=value1&amp;key2=value2`.
  * The examples below skip the percent-encoding for readability.
  *
  * Example 1
@@ -721,9 +725,13 @@ protected Builder newBuilderForType(com.google.protobuf.GeneratedMessage.Builder
    * app_profile_id: profiles/prof_qux
    * }
    *
-   * The routing header consists of one or multiple key-value pairs. Every key
-   * and value must be percent-encoded, and joined together in the format of
-   * `key1=value1&amp;key2=value2`.
+   * The routing header consists of one or multiple key-value pairs. The order of
+   * the key-value pairs is undefined, the order of the `routing_parameters` in
+   * the `RoutingRule` only matters for the evaluation order of the path
+   * templates when `field` is the same. See the examples below for more details.
+   *
+   * Every key and value in the routing header must be percent-encoded,
+   * and joined together in the following format: `key1=value1&amp;key2=value2`.
    * The examples below skip the percent-encoding for readability.
    *
    * Example 1
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/Service.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/Service.java
index 2a5f6ffc6b..cfeb4269c6 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/Service.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/Service.java
@@ -1292,8 +1292,7 @@ public com.google.api.MetricDescriptorOrBuilder getMetricsOrBuilder(int index) {
    *
    * <pre>
    * Defines the monitored resources used by this service. This is required
-   * by the [Service.monitoring][google.api.Service.monitoring] and
-   * [Service.logging][google.api.Service.logging] configurations.
+   * by the `Service.monitoring` and `Service.logging` configurations.
    * </pre>
    *
    * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -1308,8 +1307,7 @@ public java.util.List<com.google.api.MonitoredResourceDescriptor> getMonitoredRe
    *
    * <pre>
    * Defines the monitored resources used by this service. This is required
-   * by the [Service.monitoring][google.api.Service.monitoring] and
-   * [Service.logging][google.api.Service.logging] configurations.
+   * by the `Service.monitoring` and `Service.logging` configurations.
    * </pre>
    *
    * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -1325,8 +1323,7 @@ public java.util.List<com.google.api.MonitoredResourceDescriptor> getMonitoredRe
    *
    * <pre>
    * Defines the monitored resources used by this service. This is required
-   * by the [Service.monitoring][google.api.Service.monitoring] and
-   * [Service.logging][google.api.Service.logging] configurations.
+   * by the `Service.monitoring` and `Service.logging` configurations.
    * </pre>
    *
    * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -1341,8 +1338,7 @@ public int getMonitoredResourcesCount() {
    *
    * <pre>
    * Defines the monitored resources used by this service. This is required
-   * by the [Service.monitoring][google.api.Service.monitoring] and
-   * [Service.logging][google.api.Service.logging] configurations.
+   * by the `Service.monitoring` and `Service.logging` configurations.
    * </pre>
    *
    * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -1357,8 +1353,7 @@ public com.google.api.MonitoredResourceDescriptor getMonitoredResources(int inde
    *
    * <pre>
    * Defines the monitored resources used by this service. This is required
-   * by the [Service.monitoring][google.api.Service.monitoring] and
-   * [Service.logging][google.api.Service.logging] configurations.
+   * by the `Service.monitoring` and `Service.logging` configurations.
    * </pre>
    *
    * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -7633,8 +7628,7 @@ private void ensureMonitoredResourcesIsMutable() {
      *
      * <pre>
      * Defines the monitored resources used by this service. This is required
-     * by the [Service.monitoring][google.api.Service.monitoring] and
-     * [Service.logging][google.api.Service.logging] configurations.
+     * by the `Service.monitoring` and `Service.logging` configurations.
      * </pre>
      *
      * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -7652,8 +7646,7 @@ public java.util.List<com.google.api.MonitoredResourceDescriptor> getMonitoredRe
      *
      * <pre>
      * Defines the monitored resources used by this service. This is required
-     * by the [Service.monitoring][google.api.Service.monitoring] and
-     * [Service.logging][google.api.Service.logging] configurations.
+     * by the `Service.monitoring` and `Service.logging` configurations.
      * </pre>
      *
      * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -7671,8 +7664,7 @@ public int getMonitoredResourcesCount() {
      *
      * <pre>
      * Defines the monitored resources used by this service. This is required
-     * by the [Service.monitoring][google.api.Service.monitoring] and
-     * [Service.logging][google.api.Service.logging] configurations.
+     * by the `Service.monitoring` and `Service.logging` configurations.
      * </pre>
      *
      * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -7690,8 +7682,7 @@ public com.google.api.MonitoredResourceDescriptor getMonitoredResources(int inde
      *
      * <pre>
      * Defines the monitored resources used by this service. This is required
-     * by the [Service.monitoring][google.api.Service.monitoring] and
-     * [Service.logging][google.api.Service.logging] configurations.
+     * by the `Service.monitoring` and `Service.logging` configurations.
      * </pre>
      *
      * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -7716,8 +7707,7 @@ public Builder setMonitoredResources(
      *
      * <pre>
      * Defines the monitored resources used by this service. This is required
-     * by the [Service.monitoring][google.api.Service.monitoring] and
-     * [Service.logging][google.api.Service.logging] configurations.
+     * by the `Service.monitoring` and `Service.logging` configurations.
      * </pre>
      *
      * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -7739,8 +7729,7 @@ public Builder setMonitoredResources(
      *
      * <pre>
      * Defines the monitored resources used by this service. This is required
-     * by the [Service.monitoring][google.api.Service.monitoring] and
-     * [Service.logging][google.api.Service.logging] configurations.
+     * by the `Service.monitoring` and `Service.logging` configurations.
      * </pre>
      *
      * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -7764,8 +7753,7 @@ public Builder addMonitoredResources(com.google.api.MonitoredResourceDescriptor
      *
      * <pre>
      * Defines the monitored resources used by this service. This is required
-     * by the [Service.monitoring][google.api.Service.monitoring] and
-     * [Service.logging][google.api.Service.logging] configurations.
+     * by the `Service.monitoring` and `Service.logging` configurations.
      * </pre>
      *
      * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -7790,8 +7778,7 @@ public Builder addMonitoredResources(
      *
      * <pre>
      * Defines the monitored resources used by this service. This is required
-     * by the [Service.monitoring][google.api.Service.monitoring] and
-     * [Service.logging][google.api.Service.logging] configurations.
+     * by the `Service.monitoring` and `Service.logging` configurations.
      * </pre>
      *
      * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -7813,8 +7800,7 @@ public Builder addMonitoredResources(
      *
      * <pre>
      * Defines the monitored resources used by this service. This is required
-     * by the [Service.monitoring][google.api.Service.monitoring] and
-     * [Service.logging][google.api.Service.logging] configurations.
+     * by the `Service.monitoring` and `Service.logging` configurations.
      * </pre>
      *
      * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -7836,8 +7822,7 @@ public Builder addMonitoredResources(
      *
      * <pre>
      * Defines the monitored resources used by this service. This is required
-     * by the [Service.monitoring][google.api.Service.monitoring] and
-     * [Service.logging][google.api.Service.logging] configurations.
+     * by the `Service.monitoring` and `Service.logging` configurations.
      * </pre>
      *
      * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -7859,8 +7844,7 @@ public Builder addAllMonitoredResources(
      *
      * <pre>
      * Defines the monitored resources used by this service. This is required
-     * by the [Service.monitoring][google.api.Service.monitoring] and
-     * [Service.logging][google.api.Service.logging] configurations.
+     * by the `Service.monitoring` and `Service.logging` configurations.
      * </pre>
      *
      * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -7881,8 +7865,7 @@ public Builder clearMonitoredResources() {
      *
      * <pre>
      * Defines the monitored resources used by this service. This is required
-     * by the [Service.monitoring][google.api.Service.monitoring] and
-     * [Service.logging][google.api.Service.logging] configurations.
+     * by the `Service.monitoring` and `Service.logging` configurations.
      * </pre>
      *
      * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -7903,8 +7886,7 @@ public Builder removeMonitoredResources(int index) {
      *
      * <pre>
      * Defines the monitored resources used by this service. This is required
-     * by the [Service.monitoring][google.api.Service.monitoring] and
-     * [Service.logging][google.api.Service.logging] configurations.
+     * by the `Service.monitoring` and `Service.logging` configurations.
      * </pre>
      *
      * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -7919,8 +7901,7 @@ public com.google.api.MonitoredResourceDescriptor.Builder getMonitoredResourcesB
      *
      * <pre>
      * Defines the monitored resources used by this service. This is required
-     * by the [Service.monitoring][google.api.Service.monitoring] and
-     * [Service.logging][google.api.Service.logging] configurations.
+     * by the `Service.monitoring` and `Service.logging` configurations.
      * </pre>
      *
      * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -7939,8 +7920,7 @@ public com.google.api.MonitoredResourceDescriptorOrBuilder getMonitoredResources
      *
      * <pre>
      * Defines the monitored resources used by this service. This is required
-     * by the [Service.monitoring][google.api.Service.monitoring] and
-     * [Service.logging][google.api.Service.logging] configurations.
+     * by the `Service.monitoring` and `Service.logging` configurations.
      * </pre>
      *
      * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -7959,8 +7939,7 @@ public com.google.api.MonitoredResourceDescriptorOrBuilder getMonitoredResources
      *
      * <pre>
      * Defines the monitored resources used by this service. This is required
-     * by the [Service.monitoring][google.api.Service.monitoring] and
-     * [Service.logging][google.api.Service.logging] configurations.
+     * by the `Service.monitoring` and `Service.logging` configurations.
      * </pre>
      *
      * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -7975,8 +7954,7 @@ public com.google.api.MonitoredResourceDescriptor.Builder addMonitoredResourcesB
      *
      * <pre>
      * Defines the monitored resources used by this service. This is required
-     * by the [Service.monitoring][google.api.Service.monitoring] and
-     * [Service.logging][google.api.Service.logging] configurations.
+     * by the `Service.monitoring` and `Service.logging` configurations.
      * </pre>
      *
      * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -7992,8 +7970,7 @@ public com.google.api.MonitoredResourceDescriptor.Builder addMonitoredResourcesB
      *
      * <pre>
      * Defines the monitored resources used by this service. This is required
-     * by the [Service.monitoring][google.api.Service.monitoring] and
-     * [Service.logging][google.api.Service.logging] configurations.
+     * by the `Service.monitoring` and `Service.logging` configurations.
      * </pre>
      *
      * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/ServiceOrBuilder.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/ServiceOrBuilder.java
index ae7e2ea7c7..474fedefe0 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/ServiceOrBuilder.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/ServiceOrBuilder.java
@@ -870,8 +870,7 @@ public interface ServiceOrBuilder
    *
    * <pre>
    * Defines the monitored resources used by this service. This is required
-   * by the [Service.monitoring][google.api.Service.monitoring] and
-   * [Service.logging][google.api.Service.logging] configurations.
+   * by the `Service.monitoring` and `Service.logging` configurations.
    * </pre>
    *
    * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -883,8 +882,7 @@ public interface ServiceOrBuilder
    *
    * <pre>
    * Defines the monitored resources used by this service. This is required
-   * by the [Service.monitoring][google.api.Service.monitoring] and
-   * [Service.logging][google.api.Service.logging] configurations.
+   * by the `Service.monitoring` and `Service.logging` configurations.
    * </pre>
    *
    * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -896,8 +894,7 @@ public interface ServiceOrBuilder
    *
    * <pre>
    * Defines the monitored resources used by this service. This is required
-   * by the [Service.monitoring][google.api.Service.monitoring] and
-   * [Service.logging][google.api.Service.logging] configurations.
+   * by the `Service.monitoring` and `Service.logging` configurations.
    * </pre>
    *
    * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -909,8 +906,7 @@ public interface ServiceOrBuilder
    *
    * <pre>
    * Defines the monitored resources used by this service. This is required
-   * by the [Service.monitoring][google.api.Service.monitoring] and
-   * [Service.logging][google.api.Service.logging] configurations.
+   * by the `Service.monitoring` and `Service.logging` configurations.
    * </pre>
    *
    * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
@@ -923,8 +919,7 @@ public interface ServiceOrBuilder
    *
    * <pre>
    * Defines the monitored resources used by this service. This is required
-   * by the [Service.monitoring][google.api.Service.monitoring] and
-   * [Service.logging][google.api.Service.logging] configurations.
+   * by the `Service.monitoring` and `Service.logging` configurations.
    * </pre>
    *
    * <code>repeated .google.api.MonitoredResourceDescriptor monitored_resources = 25;</code>
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/UsageRule.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/UsageRule.java
index d011c39799..254127e734 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/UsageRule.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/UsageRule.java
@@ -25,30 +25,6 @@
  *
  * <pre>
  * Usage configuration rules for the service.
- *
- * NOTE: Under development.
- *
- *
- * Use this rule to configure unregistered calls for the service. Unregistered
- * calls are calls that do not contain consumer project identity.
- * (Example: calls that do not contain an API key).
- * By default, API methods do not allow unregistered calls, and each method call
- * must be identified by a consumer project identity. Use this rule to
- * allow/disallow unregistered calls.
- *
- * Example of an API that wants to allow unregistered calls for entire service.
- *
- * usage:
- * rules:
- * - selector: "*"
- * allow_unregistered_calls: true
- *
- * Example of a method that wants to allow unregistered calls.
- *
- * usage:
- * rules:
- * - selector: "google.example.library.v1.LibraryService.CreateBook"
- * allow_unregistered_calls: true
  * </pre>
  *
  * Protobuf type {@code google.api.UsageRule}
@@ -159,8 +135,12 @@ public com.google.protobuf.ByteString getSelectorBytes() {
    *
    *
    * <pre>
-   * If true, the selected method allows unregistered calls, e.g. calls
-   * that don't identify any user or application.
+   * Use this rule to configure unregistered calls for the service. Unregistered
+   * calls are calls that do not contain consumer project identity.
+   * (Example: calls that do not contain an API key).
+   *
+   * WARNING: By default, API methods do not allow unregistered calls, and each
+   * method call must be identified by a consumer project identity.
    * </pre>
    *
    * <code>bool allow_unregistered_calls = 2;</code>
@@ -375,30 +355,6 @@ protected Builder newBuilderForType(com.google.protobuf.GeneratedMessage.Builder
    *
    * <pre>
    * Usage configuration rules for the service.
-   *
-   * NOTE: Under development.
-   *
-   *
-   * Use this rule to configure unregistered calls for the service. Unregistered
-   * calls are calls that do not contain consumer project identity.
-   * (Example: calls that do not contain an API key).
-   * By default, API methods do not allow unregistered calls, and each method call
-   * must be identified by a consumer project identity. Use this rule to
-   * allow/disallow unregistered calls.
-   *
-   * Example of an API that wants to allow unregistered calls for entire service.
-   *
-   * usage:
-   * rules:
-   * - selector: "*"
-   * allow_unregistered_calls: true
-   *
-   * Example of a method that wants to allow unregistered calls.
-   *
-   * usage:
-   * rules:
-   * - selector: "google.example.library.v1.LibraryService.CreateBook"
-   * allow_unregistered_calls: true
    * </pre>
    *
    * Protobuf type {@code google.api.UsageRule}
@@ -701,8 +657,12 @@ public Builder setSelectorBytes(com.google.protobuf.ByteString value) {
      *
      *
      * <pre>
-     * If true, the selected method allows unregistered calls, e.g. calls
-     * that don't identify any user or application.
+     * Use this rule to configure unregistered calls for the service. Unregistered
+     * calls are calls that do not contain consumer project identity.
+     * (Example: calls that do not contain an API key).
+     *
+     * WARNING: By default, API methods do not allow unregistered calls, and each
+     * method call must be identified by a consumer project identity.
      * </pre>
      *
      * <code>bool allow_unregistered_calls = 2;</code>
@@ -718,8 +678,12 @@ public boolean getAllowUnregisteredCalls() {
      *
      *
      * <pre>
-     * If true, the selected method allows unregistered calls, e.g. calls
-     * that don't identify any user or application.
+     * Use this rule to configure unregistered calls for the service. Unregistered
+     * calls are calls that do not contain consumer project identity.
+     * (Example: calls that do not contain an API key).
+     *
+     * WARNING: By default, API methods do not allow unregistered calls, and each
+     * method call must be identified by a consumer project identity.
      * </pre>
      *
      * <code>bool allow_unregistered_calls = 2;</code>
@@ -739,8 +703,12 @@ public Builder setAllowUnregisteredCalls(boolean value) {
      *
      *
      * <pre>
-     * If true, the selected method allows unregistered calls, e.g. calls
-     * that don't identify any user or application.
+     * Use this rule to configure unregistered calls for the service. Unregistered
+     * calls are calls that do not contain consumer project identity.
+     * (Example: calls that do not contain an API key).
+     *
+     * WARNING: By default, API methods do not allow unregistered calls, and each
+     * method call must be identified by a consumer project identity.
      * </pre>
      *
      * <code>bool allow_unregistered_calls = 2;</code>
diff --git a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/UsageRuleOrBuilder.java b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/UsageRuleOrBuilder.java
index 71a6dedd1e..81fae159d8 100644
--- a/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/UsageRuleOrBuilder.java
+++ b/java-common-protos/proto-google-common-protos/src/main/java/com/google/api/UsageRuleOrBuilder.java
@@ -64,8 +64,12 @@ public interface UsageRuleOrBuilder
    *
    *
    * <pre>
-   * If true, the selected method allows unregistered calls, e.g. calls
-   * that don't identify any user or application.
+   * Use this rule to configure unregistered calls for the service. Unregistered
+   * calls are calls that do not contain consumer project identity.
+   * (Example: calls that do not contain an API key).
+   *
+   * WARNING: By default, API methods do not allow unregistered calls, and each
+   * method call must be identified by a consumer project identity.
    * </pre>
    *
    * <code>bool allow_unregistered_calls = 2;</code>
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/auth.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/auth.proto
index cb640bd68c..9b025bac15 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/auth.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/auth.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -199,6 +199,7 @@ message OAuthRequirements {
   // The list of publicly documented OAuth scopes that are allowed access. An
   // OAuth token containing any of these scopes will be accepted.
   //
+  //
   // Example:
   //
   //      canonical_scopes: https://www.googleapis.com/auth/calendar,
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/backend.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/backend.proto
index 8d2206e535..7bff445a34 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/backend.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/backend.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -128,6 +128,10 @@ message BackendRule {
   // operation. The default is no deadline.
   double operation_deadline = 5;
 
+  // Path translation specifies how to combine the backend address with the
+  // request path in order to produce the appropriate forwarding URL for the
+  // request. See [PathTranslation][google.api.BackendRule.PathTranslation] for
+  // more details.
   PathTranslation path_translation = 6;
 
   // Authentication settings used by the backend.
@@ -182,4 +186,11 @@ message BackendRule {
 
   // The map between request protocol and the backend address.
   map<string, BackendRule> overrides_by_request_protocol = 10;
+
+  // The load balancing policy used for connection to the application backend.
+  //
+  // Defined as an arbitrary string to accomondate custom load balancing
+  // policies supported by the underlying channel, but suggest most users use
+  // one of the standard policies, such as the default, "RoundRobin".
+  string load_balancing_policy = 11;
 }
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/billing.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/billing.proto
index 7c82274229..2b86bb61e4 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/billing.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/billing.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/client.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/client.proto
index 3d692560ab..3e68d678c4 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/client.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/client.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -41,15 +41,15 @@ extend google.protobuf.MethodOptions {
   //
   // For example, the proto RPC and annotation:
   //
-  //   rpc CreateSubscription(CreateSubscriptionRequest)
-  //       returns (Subscription) {
-  //     option (google.api.method_signature) = "name,topic";
-  //   }
+  //     rpc CreateSubscription(CreateSubscriptionRequest)
+  //         returns (Subscription) {
+  //       option (google.api.method_signature) = "name,topic";
+  //     }
   //
   // Would add the following Java overload (in addition to the method accepting
   // the request object):
   //
-  //   public final Subscription createSubscription(String name, String topic)
+  //     public final Subscription createSubscription(String name, String topic)
   //
   // The following backwards-compatibility guidelines apply:
   //
@@ -71,32 +71,32 @@ extend google.protobuf.ServiceOptions {
   //
   // Example:
   //
-  //   service Foo {
-  //     option (google.api.default_host) = "foo.googleapi.com";
-  //     ...
-  //   }
+  //     service Foo {
+  //       option (google.api.default_host) = "foo.googleapi.com";
+  //       ...
+  //     }
   string default_host = 1049;
 
   // OAuth scopes needed for the client.
   //
   // Example:
   //
-  //   service Foo {
-  //     option (google.api.oauth_scopes) = \
-  //       "https://www.googleapis.com/auth/cloud-platform";
-  //     ...
-  //   }
+  //     service Foo {
+  //       option (google.api.oauth_scopes) = \
+  //         "https://www.googleapis.com/auth/cloud-platform";
+  //       ...
+  //     }
   //
   // If there is more than one scope, use a comma-separated string:
   //
   // Example:
   //
-  //   service Foo {
-  //     option (google.api.oauth_scopes) = \
-  //       "https://www.googleapis.com/auth/cloud-platform,"
-  //       "https://www.googleapis.com/auth/monitoring";
-  //     ...
-  //   }
+  //     service Foo {
+  //       option (google.api.oauth_scopes) = \
+  //         "https://www.googleapis.com/auth/cloud-platform,"
+  //         "https://www.googleapis.com/auth/monitoring";
+  //       ...
+  //     }
   string oauth_scopes = 1050;
 
   // The API version of this service, which should be sent by version-aware
@@ -110,9 +110,9 @@ extend google.protobuf.ServiceOptions {
   //
   // Example:
   //
-  //   service Foo {
-  //     option (google.api.api_version) = "v1_20230821_preview";
-  //   }
+  //     service Foo {
+  //       option (google.api.api_version) = "v1_20230821_preview";
+  //     }
   string api_version = 525000001;
 }
 
@@ -227,9 +227,10 @@ message JavaSettings {
   //
   // Example of a YAML configuration::
   //
-  //  publishing:
-  //    java_settings:
-  //      library_package: com.google.cloud.pubsub.v1
+  //     publishing:
+  //       library_settings:
+  //         java_settings:
+  //           library_package: com.google.cloud.pubsub.v1
   string library_package = 1;
 
   // Configure the Java class name to use instead of the service's for its
@@ -241,11 +242,11 @@ message JavaSettings {
   //
   // Example of a YAML configuration::
   //
-  //  publishing:
-  //    java_settings:
-  //      service_class_names:
-  //        - google.pubsub.v1.Publisher: TopicAdmin
-  //        - google.pubsub.v1.Subscriber: SubscriptionAdmin
+  //     publishing:
+  //       java_settings:
+  //         service_class_names:
+  //           - google.pubsub.v1.Publisher: TopicAdmin
+  //           - google.pubsub.v1.Subscriber: SubscriptionAdmin
   map<string, string> service_class_names = 2;
 
   // Some settings.
@@ -262,6 +263,20 @@ message CppSettings {
 message PhpSettings {
   // Some settings.
   CommonLanguageSettings common = 1;
+
+  // The package name to use in Php. Clobbers the php_namespace option
+  // set in the protobuf. This should be used **only** by APIs
+  // who have already set the language_settings.php.package_name" field
+  // in gapic.yaml. API teams should use the protobuf php_namespace option
+  // where possible.
+  //
+  // Example of a YAML configuration::
+  //
+  //     publishing:
+  //       library_settings:
+  //         php_settings:
+  //           library_package: Google\Cloud\PubSub\V1
+  string library_package = 2;
 }
 
 // Settings for Python client libraries.
@@ -353,10 +368,12 @@ message GoSettings {
   // service names and values are the name to be used for the service client
   // and call options.
   //
-  // publishing:
-  //   go_settings:
-  //     renamed_services:
-  //       Publisher: TopicAdmin
+  // Example:
+  //
+  //     publishing:
+  //       go_settings:
+  //         renamed_services:
+  //           Publisher: TopicAdmin
   map<string, string> renamed_services = 2;
 }
 
@@ -391,10 +408,10 @@ message MethodSettings {
   //
   // Example:
   //
-  //    publishing:
-  //      method_settings:
-  //      - selector: google.storage.control.v2.StorageControl.CreateFolder
-  //        # method settings for CreateFolder...
+  //     publishing:
+  //       method_settings:
+  //       - selector: google.storage.control.v2.StorageControl.CreateFolder
+  //         # method settings for CreateFolder...
   string selector = 1;
 
   // Describes settings to use for long-running operations when generating
@@ -403,14 +420,14 @@ message MethodSettings {
   //
   // Example of a YAML configuration::
   //
-  //    publishing:
-  //      method_settings:
-  //      - selector: google.cloud.speech.v2.Speech.BatchRecognize
-  //        long_running:
-  //          initial_poll_delay: 60s # 1 minute
-  //          poll_delay_multiplier: 1.5
-  //          max_poll_delay: 360s # 6 minutes
-  //          total_poll_timeout: 54000s # 90 minutes
+  //     publishing:
+  //       method_settings:
+  //       - selector: google.cloud.speech.v2.Speech.BatchRecognize
+  //         long_running:
+  //           initial_poll_delay: 60s # 1 minute
+  //           poll_delay_multiplier: 1.5
+  //           max_poll_delay: 360s # 6 minutes
+  //           total_poll_timeout: 54000s # 90 minutes
   LongRunning long_running = 2;
 
   // List of top-level fields of the request message, that should be
@@ -419,12 +436,25 @@ message MethodSettings {
   //
   // Example of a YAML configuration:
   //
-  //    publishing:
-  //      method_settings:
-  //      - selector: google.example.v1.ExampleService.CreateExample
-  //        auto_populated_fields:
-  //        - request_id
+  //     publishing:
+  //       method_settings:
+  //       - selector: google.example.v1.ExampleService.CreateExample
+  //         auto_populated_fields:
+  //         - request_id
   repeated string auto_populated_fields = 3;
+
+  // Batching configuration for an API method in client libraries.
+  //
+  // Example of a YAML configuration:
+  //
+  //     publishing:
+  //       method_settings:
+  //       - selector: google.example.v1.ExampleService.BatchCreateExample
+  //         batching:
+  //           element_count_threshold: 1000
+  //           request_byte_threshold: 100000000
+  //           delay_threshold_millis: 10
+  BatchingConfigProto batching = 4;
 }
 
 // The organization for which the client libraries are being published.
@@ -484,3 +514,81 @@ message SelectiveGapicGeneration {
   // obfuscated identifiers, or other language idiomatic patterns.
   bool generate_omitted_as_internal = 2;
 }
+
+// `BatchingConfigProto` defines the batching configuration for an API method.
+message BatchingConfigProto {
+  // The thresholds which trigger a batched request to be sent.
+  BatchingSettingsProto thresholds = 1;
+
+  // The request and response fields used in batching.
+  BatchingDescriptorProto batch_descriptor = 2;
+}
+
+// `BatchingSettingsProto` specifies a set of batching thresholds, each of
+// which acts as a trigger to send a batch of messages as a request. At least
+// one threshold must be positive nonzero.
+message BatchingSettingsProto {
+  // The number of elements of a field collected into a batch which, if
+  // exceeded, causes the batch to be sent.
+  int32 element_count_threshold = 1;
+
+  // The aggregated size of the batched field which, if exceeded, causes the
+  // batch to be sent. This size is computed by aggregating the sizes of the
+  // request field to be batched, not of the entire request message.
+  int64 request_byte_threshold = 2;
+
+  // The duration after which a batch should be sent, starting from the addition
+  // of the first message to that batch.
+  google.protobuf.Duration delay_threshold = 3;
+
+  // The maximum number of elements collected in a batch that could be accepted
+  // by server.
+  int32 element_count_limit = 4;
+
+  // The maximum size of the request that could be accepted by server.
+  int32 request_byte_limit = 5;
+
+  // The maximum number of elements allowed by flow control.
+  int32 flow_control_element_limit = 6;
+
+  // The maximum size of data allowed by flow control.
+  int32 flow_control_byte_limit = 7;
+
+  // The behavior to take when the flow control limit is exceeded.
+  FlowControlLimitExceededBehaviorProto flow_control_limit_exceeded_behavior =
+      8;
+}
+
+// The behavior to take when the flow control limit is exceeded.
+enum FlowControlLimitExceededBehaviorProto {
+  // Default behavior, system-defined.
+  UNSET_BEHAVIOR = 0;
+
+  // Stop operation, raise error.
+  THROW_EXCEPTION = 1;
+
+  // Pause operation until limit clears.
+  BLOCK = 2;
+
+  // Continue operation, disregard limit.
+  IGNORE = 3;
+}
+
+// `BatchingDescriptorProto` specifies the fields of the request message to be
+// used for batching, and, optionally, the fields of the response message to be
+// used for demultiplexing.
+message BatchingDescriptorProto {
+  // The repeated field in the request message to be aggregated by batching.
+  string batched_field = 1;
+
+  // A list of the fields in the request message. Two requests will be batched
+  // together only if the values of every field specified in
+  // `request_discriminator_fields` is equal between the two requests.
+  repeated string discriminator_fields = 2;
+
+  // Optional. When present, indicates the field in the response message to be
+  // used to demultiplex the response into multiple response messages, in
+  // correspondence with the multiple request messages originally batched
+  // together.
+  string subresponse_field = 3;
+}
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/config_change.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/config_change.proto
index c1cc0e8b05..b6792b9a50 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/config_change.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/config_change.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/context.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/context.proto
index 5b137f5f79..c1704f1e99 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/context.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/context.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/control.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/control.proto
index ce3f2871d7..c0dc0cdc3d 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/control.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/control.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -32,8 +32,8 @@ option objc_class_prefix = "GAPI";
 //       environment: servicecontrol.googleapis.com
 message Control {
   // The service controller environment to use. If empty, no control plane
-  // feature (like quota and billing) will be enabled. The recommended value for
-  // most services is servicecontrol.googleapis.com
+  // features (like quota and billing) will be enabled. The recommended value
+  // for most services is servicecontrol.googleapis.com.
   string environment = 1;
 
   // Defines policies applying to the API methods of the service.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/distribution.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/distribution.proto
index 215be7d364..51cf36ef4f 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/distribution.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/distribution.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/documentation.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/documentation.proto
index b94a06d473..a730ab89a5 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/documentation.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/documentation.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/endpoint.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/endpoint.proto
index a9fa9992a4..047cf54d51 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/endpoint.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/endpoint.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/error_reason.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/error_reason.proto
index 030888ae33..3b4826e5f7 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/error_reason.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/error_reason.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -619,4 +619,189 @@ enum ErrorReason {
   //   }
   // }
   OVERLOADED_CREDENTIALS = 34;
+
+  // The request whose associated location violates the location org policy
+  // restrictions when creating resources in the restricted region.
+  //
+  // Example of an ErrorInfo when creating the Cloud Storage Bucket in the
+  // container "projects/123" under a restricted region
+  // "locations/asia-northeast3":
+  //
+  //     {
+  //       "reason": "LOCATION_ORG_POLICY_VIOLATED",
+  //       "domain": "googleapis.com",
+  //       "metadata": {
+  //         "resource": "projects/123",
+  //         "location": "locations/asia-northeast3"
+  //       }
+  //     }
+  //
+  // This response indicates creating the Cloud Storage Bucket in
+  // "locations/asia-northeast3" violates the location org policy restriction.
+  LOCATION_ORG_POLICY_VIOLATED = 35;
+
+  // The request is denied because it access data of regulated customers using
+  // TLS 1.0 and 1.1.
+  //
+  // Example of an ErrorInfo when accessing a GCP resource "projects/123" that
+  // is restricted by TLS Version Restriction for "pubsub.googleapis.com"
+  // service.
+  //
+  //     {
+  //       "reason": "TLS_ORG_POLICY_VIOLATED",
+  //       "domain": "googleapis.com",
+  //       "metadata": {
+  //         "service": "pubsub.googleapis.com"
+  //         "resource": "projects/123",
+  //         "policyName": "constraints/gcp.restrictTLSVersion",
+  //         "tlsVersion": "TLS_VERSION_1"
+  //       }
+  //     }
+  TLS_ORG_POLICY_VIOLATED = 36;
+
+  // The request is denied because the associated project has exceeded the
+  // emulator quota limit.
+  //
+  // Example of an ErrorInfo when the associated "projects/123" has exceeded the
+  // emulator quota limit.
+  //
+  //     {
+  //       "reason": "EMULATOR_QUOTA_EXCEEDED",
+  //       "domain": "googleapis.com",
+  //       "metadata": {
+  //           "service": "pubsub.googleapis.com"
+  //           "consumer": "projects/123"
+  //        }
+  //     }
+  EMULATOR_QUOTA_EXCEEDED = 38;
+
+  // The request is denied because the associated application credential header
+  // is invalid for an Android applications.
+  //
+  // Example of an ErrorInfo when the request from an Android application to the
+  // "pubsub.googleapis.com" with an invalid application credential header.
+  //
+  //     {
+  //       "reason": "CREDENTIAL_ANDROID_APP_INVALID",
+  //       "domain": "googleapis.com",
+  //       "metadata": {
+  //           "service": "pubsub.googleapis.com"
+  //        }
+  //     }
+  CREDENTIAL_ANDROID_APP_INVALID = 39;
+
+  // The request is denied because IAM permission on resource is denied.
+  //
+  // Example of an ErrorInfo when the IAM permission `aiplatform.datasets.list`
+  // is denied on resource `projects/123`.
+  //
+  //     {
+  //       "reason": "IAM_PERMISSION_DENIED",
+  //       "domain": "googleapis.com",
+  //       "metadata": {
+  //           "resource": "projects/123"
+  //           "permission": "aiplatform.datasets.list"
+  //        }
+  //     }
+  IAM_PERMISSION_DENIED = 41;
+
+  // The request is denied because it contains the invalid JWT token.
+  //
+  // Example of an ErrorInfo when the request contains an invalid JWT token for
+  // service `storage.googleapis.com`.
+  //
+  //     {
+  //       "reason": "JWT_TOKEN_INVALID",
+  //       "domain": "googleapis.com",
+  //       "metadata": {
+  //           "service": "storage.googleapis.com"
+  //        }
+  //     }
+  JWT_TOKEN_INVALID = 42;
+
+  // The request is denied because it contains credential with type that is
+  // unsupported.
+  //
+  // Example of an ErrorInfo when the request contains an unsupported credential
+  // type for service `storage.googleapis.com`.
+  //
+  //     {
+  //       "reason": "CREDENTIAL_TYPE_UNSUPPORTED",
+  //       "domain": "googleapis.com",
+  //       "metadata": {
+  //           "service": "storage.googleapis.com"
+  //        }
+  //     }
+  CREDENTIAL_TYPE_UNSUPPORTED = 43;
+
+  // The request is denied because it contains unsupported account type.
+  //
+  // Example of an ErrorInfo when the request contains an unsupported account
+  // type for service `storage.googleapis.com`.
+  //
+  //     {
+  //       "reason": "ACCOUNT_TYPE_UNSUPPORTED",
+  //       "domain": "googleapis.com",
+  //       "metadata": {
+  //           "service": "storage.googleapis.com"
+  //        }
+  //     }
+  ACCOUNT_TYPE_UNSUPPORTED = 44;
+
+  // The request is denied because the API endpoint is restricted by
+  // administrators according to the organization policy constraint.
+  // For more information see
+  // https://cloud.google.com/assured-workloads/docs/restrict-endpoint-usage.
+  //
+  // Example of an ErrorInfo when access to Google Cloud Storage service is
+  // restricted by Restrict Endpoint Usage policy:
+  //
+  //     {
+  //       "reason": "ENDPOINT_USAGE_RESTRICTION_VIOLATED",
+  //       "domain": "googleapis.com/policies/endpointUsageRestriction",
+  //       "metadata": {
+  //         "policy_name": "constraints/gcp.restrictEndpointUsage",
+  //         "checked_value": "storage.googleapis.com"
+  //         "consumer": "organization/123"
+  //         "service": "storage.googleapis.com"
+  //        }
+  //     }
+  ENDPOINT_USAGE_RESTRICTION_VIOLATED = 45;
+
+  // The request is denied because the TLS Cipher Suite is restricted by
+  // administrators according to the organization policy constraint.
+  // For more information see
+  // https://cloud.google.com/assured-workloads/docs/restrict-tls-cipher-suites
+  //
+  // Example of an ErrorInfo when access to Google Cloud BigQuery service is
+  // restricted by Restrict TLS Cipher Suites policy:
+  //
+  //     {
+  //       "reason": "TLS_CIPHER_RESTRICTION_VIOLATED",
+  //       "domain": "googleapis.com/policies/tlsCipherRestriction",
+  //       "metadata": {
+  //         "policy_name": "constraints/gcp.restrictTLSCipherSuites",
+  //         "checked_value": "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
+  //         "consumer": "organization/123"
+  //         "service": "bigquery.googleapis.com"
+  //        }
+  //     }
+  TLS_CIPHER_RESTRICTION_VIOLATED = 46;
+
+  // The request is denied because the MCP activation check fails.
+  //
+  // Example of an ErrorInfo when the container "projects/123" contacting
+  // "pubsub.googleapis.com" service which is disabled by MCP:
+  //
+  //     { "reason": "MCP_SERVER_DISABLED",
+  //       "domain": "googleapis.com",
+  //       "metadata": {
+  //         "consumer": "projects/123",
+  //         "service": "pubsub.googleapis.com"
+  //       }
+  //     }
+  //
+  // This response indicates the "pubsub.googleapis.com" has been disabled in
+  // "projects/123" for MCP.
+  MCP_SERVER_DISABLED = 47;
 }
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/field_behavior.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/field_behavior.proto
index 1fdaaed11a..861f8254fb 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/field_behavior.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/field_behavior.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/field_info.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/field_info.proto
index aaa07a1815..64387fde13 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/field_info.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/field_info.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/http.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/http.proto
index 57621b5374..bb3af8e56a 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/http.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/http.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/httpbody.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/httpbody.proto
index e3e17c8acb..3fd226a987 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/httpbody.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/httpbody.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/label.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/label.proto
index 739e4e95ed..5d77c70882 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/label.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/label.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/launch_stage.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/launch_stage.proto
index 1e86c1ad17..0fff247bd8 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/launch_stage.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/launch_stage.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/log.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/log.proto
index 3d55e408be..2f13e72750 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/log.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/log.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/logging.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/logging.proto
index 613e005ed5..7a82de9acb 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/logging.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/logging.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/metric.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/metric.proto
index 9da49ba0cd..b7fb82a9bb 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/metric.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/metric.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/monitored_resource.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/monitored_resource.proto
index 36abe14ca0..eaf1f1280b 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/monitored_resource.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/monitored_resource.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/monitoring.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/monitoring.proto
index 5c3b2d9d90..b939a0ca2a 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/monitoring.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/monitoring.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/policy.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/policy.proto
index cc577a169b..c925fdc427 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/policy.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/policy.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/quota.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/quota.proto
index 9e7fb3bf65..29ae86ed46 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/quota.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/quota.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/resource.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/resource.proto
index 5669cbc985..2a5213bb08 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/resource.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/resource.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/routing.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/routing.proto
index 4fcb2acb6c..020d32f7b7 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/routing.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/routing.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -59,9 +59,13 @@ extend google.protobuf.MethodOptions {
 //       app_profile_id: profiles/prof_qux
 //     }
 //
-// The routing header consists of one or multiple key-value pairs. Every key
-// and value must be percent-encoded, and joined together in the format of
-// `key1=value1&key2=value2`.
+// The routing header consists of one or multiple key-value pairs. The order of
+// the key-value pairs is undefined, the order of the `routing_parameters` in
+// the `RoutingRule` only matters for the evaluation order of the path
+// templates when `field` is the same. See the examples below for more details.
+//
+// Every key and value in the routing header must be percent-encoded,
+// and joined together in the following format: `key1=value1&key2=value2`.
 // The examples below skip the percent-encoding for readability.
 //
 // Example 1
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/service.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/service.proto
index 598b75a0e4..9952ca0e8d 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/service.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/service.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -159,8 +159,7 @@ message Service {
   repeated MetricDescriptor metrics = 24;
 
   // Defines the monitored resources used by this service. This is required
-  // by the [Service.monitoring][google.api.Service.monitoring] and
-  // [Service.logging][google.api.Service.logging] configurations.
+  // by the `Service.monitoring` and `Service.logging` configurations.
   repeated MonitoredResourceDescriptor monitored_resources = 25;
 
   // Billing configuration.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/source_info.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/source_info.proto
index 3257b5a722..1d4094e13d 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/source_info.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/source_info.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/system_parameter.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/system_parameter.proto
index 15b93f913e..5ab1f37e1b 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/system_parameter.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/system_parameter.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/usage.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/usage.proto
index 4b7aa5fdf2..df1b93b39f 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/usage.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/usage.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -52,30 +52,6 @@ message Usage {
 }
 
 // Usage configuration rules for the service.
-//
-// NOTE: Under development.
-//
-//
-// Use this rule to configure unregistered calls for the service. Unregistered
-// calls are calls that do not contain consumer project identity.
-// (Example: calls that do not contain an API key).
-// By default, API methods do not allow unregistered calls, and each method call
-// must be identified by a consumer project identity. Use this rule to
-// allow/disallow unregistered calls.
-//
-// Example of an API that wants to allow unregistered calls for entire service.
-//
-//     usage:
-//       rules:
-//       - selector: "*"
-//         allow_unregistered_calls: true
-//
-// Example of a method that wants to allow unregistered calls.
-//
-//     usage:
-//       rules:
-//       - selector: "google.example.library.v1.LibraryService.CreateBook"
-//         allow_unregistered_calls: true
 message UsageRule {
   // Selects the methods to which this rule applies. Use '*' to indicate all
   // methods in all APIs.
@@ -84,8 +60,12 @@ message UsageRule {
   // details.
   string selector = 1;
 
-  // If true, the selected method allows unregistered calls, e.g. calls
-  // that don't identify any user or application.
+  // Use this rule to configure unregistered calls for the service. Unregistered
+  // calls are calls that do not contain consumer project identity.
+  // (Example: calls that do not contain an API key).
+  //
+  // WARNING: By default, API methods do not allow unregistered calls, and each
+  // method call must be identified by a consumer project identity.
   bool allow_unregistered_calls = 2;
 
   // If true, the selected method should skip service control and the control
diff --git a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/visibility.proto b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/visibility.proto
index 0ab5bdc1c9..fb5cac6f26 100644
--- a/java-common-protos/proto-google-common-protos/src/main/proto/google/api/visibility.proto
+++ b/java-common-protos/proto-google-common-protos/src/main/proto/google/api/visibility.proto
@@ -1,4 +1,4 @@
-// Copyright 2025 Google LLC
+// Copyright 2026 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/java-showcase/gapic-showcase/src/main/resources/META-INF/native-image/com.google.showcase.v1beta1/reflect-config.json b/java-showcase/gapic-showcase/src/main/resources/META-INF/native-image/com.google.showcase.v1beta1/reflect-config.json
index 55863aee26..4fcf07d483 100644
--- a/java-showcase/gapic-showcase/src/main/resources/META-INF/native-image/com.google.showcase.v1beta1/reflect-config.json
+++ b/java-showcase/gapic-showcase/src/main/resources/META-INF/native-image/com.google.showcase.v1beta1/reflect-config.json
@@ -1,4 +1,58 @@
 [
+  {
+    "name": "com.google.api.BatchingConfigProto",
+    "queryAllDeclaredConstructors": true,
+    "queryAllPublicConstructors": true,
+    "queryAllDeclaredMethods": true,
+    "allPublicMethods": true,
+    "allDeclaredClasses": true,
+    "allPublicClasses": true
+  },
+  {
+    "name": "com.google.api.BatchingConfigProto$Builder",
+    "queryAllDeclaredConstructors": true,
+    "queryAllPublicConstructors": true,
+    "queryAllDeclaredMethods": true,
+    "allPublicMethods": true,
+    "allDeclaredClasses": true,
+    "allPublicClasses": true
+  },
+  {
+    "name": "com.google.api.BatchingDescriptorProto",
+    "queryAllDeclaredConstructors": true,
+    "queryAllPublicConstructors": true,
+    "queryAllDeclaredMethods": true,
+    "allPublicMethods": true,
+    "allDeclaredClasses": true,
+    "allPublicClasses": true
+  },
+  {
+    "name": "com.google.api.BatchingDescriptorProto$Builder",
+    "queryAllDeclaredConstructors": true,
+    "queryAllPublicConstructors": true,
+    "queryAllDeclaredMethods": true,
+    "allPublicMethods": true,
+    "allDeclaredClasses": true,
+    "allPublicClasses": true
+  },
+  {
+    "name": "com.google.api.BatchingSettingsProto",
+    "queryAllDeclaredConstructors": true,
+    "queryAllPublicConstructors": true,
+    "queryAllDeclaredMethods": true,
+    "allPublicMethods": true,
+    "allDeclaredClasses": true,
+    "allPublicClasses": true
+  },
+  {
+    "name": "com.google.api.BatchingSettingsProto$Builder",
+    "queryAllDeclaredConstructors": true,
+    "queryAllPublicConstructors": true,
+    "queryAllDeclaredMethods": true,
+    "allPublicMethods": true,
+    "allDeclaredClasses": true,
+    "allPublicClasses": true
+  },
   {
     "name": "com.google.api.ClientLibraryDestination",
     "queryAllDeclaredConstructors": true,
@@ -143,6 +197,15 @@
     "allDeclaredClasses": true,
     "allPublicClasses": true
   },
+  {
+    "name": "com.google.api.FlowControlLimitExceededBehaviorProto",
+    "queryAllDeclaredConstructors": true,
+    "queryAllPublicConstructors": true,
+    "queryAllDeclaredMethods": true,
+    "allPublicMethods": true,
+    "allDeclaredClasses": true,
+    "allPublicClasses": true
+  },
   {
     "name": "com.google.api.GoSettings",
     "queryAllDeclaredConstructors": true,