def METHOD_NAME(namespace: str, kind: str) -> None:
    """
    Deletes all entities of the given kind in given namespace.
    Use this only when you need to "clean up".
    """
    client = datastore.Client()
    query = client.query(kind=kind, namespace=namespace)
    keys = []
    for result in query.fetch():
        keys.append(result.key)
    for chunk in chunked(keys, 500):
        client.delete_multi(chunk)
    print(f"deleted {len(keys)} entities")