code: async def send_container_update_to_client(self, client_addrs):
          
          self._logger.debug("Sending containers updates...")
          available_containers = tuple(self._containers.keys())
          msg = BackendUpdateContainers(available_containers)
          for client in client_addrs:
              await ZMQUtils.send_with_addr(self._client_socket, client, msg)
docs: :param client_addrs: list of clients to which we should send the update