Device component:

    # devices via their controller_id) come before the devices that depend on them.

    graph : Dict[str, Set[str]] = dict()

    for dev_uuid, sub_device in new_sub_devices.items():

        if dev_uuid == device_uuid: continue # current device has no dependencies

        predecesors = graph.setdefault(dev_uuid, set())

        ctrl_uuid = get_device_controller_uuid(sub_device)

        if ctrl_uuid is None: continue # sub_device has no controller