def __delitem__(self, key):
        dict.__delitem__(self, key)
        self._keys.remove(key)
Creates a savepoint (if supported and required by the backend) inside the
dataset/ETHPy150Open ioflo/ioflo/ioflo/aid/odicting.py/odict.__delitem__--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/django/db/backends/__init__.py/BaseDatabaseWrapper.savepoint