def StoreKeys(self, unused_kind, unused_key_start, unused_key_end):
    return 'fake-key'
Pretend to store a key in the stub database.
dataset/ETHPy150Open GoogleCloudPlatform/python-compat-runtime/appengine-compat/exported_appengine_sdk/google/appengine/tools/bulkloader.py/StubProgressDatabase.StoreKeys