async def send_container_update_to_client(self, client_addrs):
        """ :param client_addrs: list of clients to which we should send the update """
        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)
:param client_addrs: list of clients to which we should send the update