docs: def _all_queue_names(self):
          """
          Return a list of all unique queue names in our config.
  
          :return: list of all queue names (str)
          :rtype: :std:term:`list`
          """
          queues = set()
          endpoints = self.config.get('endpoints')
          for e in endpoints:
              for q in endpoints[e]['queues']:
                  queues.add(q)
          return sorted(queues)