def keys_only(self):
        self._projection[:] = ['__key__']
Gets the parent of this Tasklet. This method may return None if the parent is no longer there.
dataset/ETHPy150Open GoogleCloudPlatform/gcloud-python/gcloud/datastore/query.py/Query.keys_only--crossover with--dataset/ETHPy150Open concurrence/concurrence/lib/concurrence/core.py/Tasklet.parent