def _setupChild(self, *args, **kwargs):
        raise NotImplementedError()
Verify that the entity is not blacklisted. Clean up old journal
dataset/ETHPy150Open twisted/twisted/twisted/internet/process.py/_BaseProcess._setupChild--crossover with--dataset/ETHPy150Open AppScale/appscale/AppDB/groomer.py/DatastoreGroomer.verify_entity