code: def ensure_queue_count(
          self, queued, url, timeout, auth, acs_url, ssl_verify, tags=None, label_tags=None, group=None
      ):
          
          metric_name = '{}.count'.format(self.QUEUE_PREFIX)
  
          apps_response = self.get_apps_json(url, timeout, auth, acs_url, ssl_verify, tags, group)
  
          for app in apps_response['apps']:
              if app['id'] not in queued:
                  q_tags = self.get_app_tags(app, tags, label_tags)
                  self.gauge(metric_name, 0, tags=q_tags)
docs: Ensure `marathon.queue.count` is reported as zero for apps without queued instances.