Helper for tagging unserializable types.

    Arguments:

        _type (type): type to be ignored.

    Returns:

        Storable: storable instance that does not poke.

def not_storable(_type):
    """
    Helper for tagging unserializable types.

    Arguments:

        _type (type): type to be ignored.

    Returns:

        Storable: storable instance that does not poke.

    """
    return Storable(_type, handlers=StorableHandler(poke=fake_poke, peek=fail_peek(_type)))