grpc_object_handle_get_attr_np - Gets handle attributes.
  grpc_error_t grpc_object_handle_get_attr_np(
                   grpc_object_handle_t_np *handle,
                   grpc_handle_attr_t_np *attr)
  grpc_object_handle_t_np *handle grpc_handle_attr_t_np *attr The grpc_object_handle_get_attr_np() function returns handle attributes for the 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_OBJECT_HANDLE_NP  GRPC_OTHER_ERROR_CODE