Create a ~uamqp.message.Message for a value supplied by the data
        generator. Applies all properties and annotations to the message.

        :rtype: ~uamqp.message.Message

def _create_batch_message(self):
        """Create a ~uamqp.message.Message for a value supplied by the data
        generator. Applies all properties and annotations to the message.

        :rtype: ~uamqp.message.Message
        """
        return Message(body=[],
                       properties=self.properties,
                       annotations=self.annotations,
                       msg_format=self.batch_format,
                       header=self.header,
                       encoding=self._encoding)