def get_globus_id_type(uuid):
    """**Not implemented**
    Determine the type of resource a Globus UUID identifies.
    This utility is not comprehensive.

    Arguments:
        uuid (str): A Globus UUID.

    Returns:
        str: The type of resource identified. Types this utility can identify:

                * ``identity``: A user's identity in Globus Auth
                * ``group``: A Globus Group
                * ``endpoint``: A Globus Transfer Endpoint

                This utility cannot detect other types of UUID.
                If the UUID is not one of the above types, or is invalid, the return
                value will be ``unknown``.
    """
    raise NotImplementedError('get_globus_id_type currently not functional')
