def ndb_del(self):
        raise Exception("Cannot delete the ndb object!")
Returns a new QuerySet that is a copy of the current one. This allows a
dataset/ETHPy150Open evennia/evennia/evennia/server/serversession.py/ServerSession.ndb_del--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/db/models/query.py/QuerySet.all