grpc_function_handle_get_error_np - Returns the error code generated by the handle.
  grpc_error_t grpc_function_handle_get_error_np(grpc_function_handle_t *handle)
  grpc_function_handle_t *handleThe grpc_function_handle_get_error_np() function returns the error code that was generated in the handle specified by function handle.
This function is MT-safe.
If successful, GRPC_NO_ERROR is returned. In the case of an error, Error code is returned.
  GRPC_NOT_INITIALIZED  GRPC_INVALID_FUNCTION_HANDLE  GRPC_OTHER_ERROR_CODE