def handle_nack(self, delivery_tag):
        _LOG.error("Message NACKed: tag=%s", delivery_tag)

        assert not self.ready, (delivery_tag, self.values)

        self(self.NACK, delivery_tag)
Message Nack'ed in RabbitMQ Publisher Acknowledgments mode
dataset/ETHPy150Open agoragames/haigha/tests/integration/rabbit_extensions_test.py/_PubackState.handle_nack