code: def delete_group_cached(group_id, broker=None):
      
      if not broker:
          broker = get_broker()
      group_key = '{}:{}:keys'.format(broker.list_key, group_id)
      group_list = broker.cache.get(group_key)
      broker.cache.delete_many(group_list)
      broker.cache.delete(group_key)
docs: Delete a group from the cache backend