code: def check_tx_ok(result):
      
      return (result.value == ReturnCode.SUCCESSFUL) or (result.value > ReturnCode.WARNING)
docs: Checks if function :meth:`UcanServer.write_can_msg` successfully wrote CAN message(s).
  
      While using :meth:`UcanServer.write_can_msg_ex` the number of sent CAN messages can be less than
      the number of CAN messages which should be sent.
  
      :param ReturnCode result: Error code of the function.
      :return: True if CAN message(s) was(were) written successfully, otherwise False.
      :rtype: bool
  
      .. :seealso: :const:`ReturnCode.WARN_TXLIMIT`