Merge PR #306

Author: darkl

src/netstandard/WampSharp/WAMP2/V2/Api/DelegatePubSub/SubscriberRegistrationInterceptor.cs

@@ -18,19 +18,19 @@ public SubscriberRegistrationInterceptor(SubscribeOptions subscriptionOptions)
             mSubscriptionOptions = subscriptionOptions;
         }
 
-        public bool IsSubscriberHandler(MethodInfo method)
+        public virtual bool IsSubscriberHandler(MethodInfo method)
         {
             return method.IsDefined(typeof (WampTopicAttribute));
         }
 
-        public string GetTopicUri(MethodInfo method)
+        public virtual string GetTopicUri(MethodInfo method)
         {
             return method.GetCustomAttribute<WampTopicAttribute>().Topic;
         }
 
-        public SubscribeOptions GetSubscribeOptions(MethodInfo method)
+        public virtual SubscribeOptions GetSubscribeOptions(MethodInfo method)
         {
             return mSubscriptionOptions;
         }
     }
-}
+}