def delete(self, session=None):
        self.deleted = True
        self.deleted_at = datetime.datetime.utcnow()
        self.save(session=session)
Used in the training phase.  Override.
dataset/ETHPy150Open rcbops/glance-buildpackage/glance/registry/db/models.py/ModelBase.delete--crossover with--dataset/ETHPy150Open VikParuchuri/simpsons-scripts/tasks/train.py/FeatureExtractor.train