def add_on_cancel_callback(self):
logger.debug('<STR_LIT>')<EOL>self._channel.add_on_cancel_callback(self.on_consumer_cancelled)<EOL>
Add a callback that will be invoked if RabbitMQ cancels the
        consumer for some reason.

        If RabbitMQ does cancel the consumer, on_consumer_cancelled will be
        invoked by pika.