def METHOD_NAME(
    self, objects: List[Tuple[str, str]], remote_engine: "PsycopgEngine"
) -> Sequence[str]:
    """Download objects from the external location into the Splitgraph cache.
    :param objects: List of tuples `(object_id, object_url)` that this handler had previously
        uploaded the objects to.
    :param remote_engine: An instance of Engine class that the objects will be registered on
    :return: A list of object IDs that have been successfully downloaded.
    """
    raise NotImplementedError()