docs: def exists(self):
          """Test if this queue exists in the AMQP store.
  
          Note: This doesn't work with redis as declaring queues has not effect
          except creating the exchange.
  
          :returns: True if the queue exists, else False.
          :rtype: bool
          """
          try:
              queue = self.queue
              queue.queue_declare(passive=True)
          except NotFound:
              return False
          except ChannelError as e:
              if e.reply_code == '404':
                  return False
              raise e
          return True