def is_valid_pid_for_create(did):
    """Assert that ``did`` can be used as a PID for creating a new object with
    MNStorage.create() or MNStorage.update()."""
    if not d1_gmn.app.did.is_valid_pid_for_create(did):
        raise d1_common.types.exceptions.IdentifierNotUnique(
            0,
            'Identifier is already in use as {}. did="{}"'.format(
                d1_gmn.app.did.classify_identifier(did), did
            ),
            identifier=did,
        )
Assert that ``did`` can be used as a PID for creating a new object with
    MNStorage.create() or MNStorage.update().