my_triact <- Triact$new()
my_triact$load_table(cows_5hz)
my_triact$add_lying()
my_triact$extract_standup()
# Error in data.table::frollapply(lying, 2, function(i) { :
# frollapply received an error(s) when evaluating FUN:
Internal error in memcpy_sexp: column type not supported in memcpyVector or memcpyDT function. All known types are supported so please report as bug.. Please report to the data.table issues tracker.