def addRevertEvent(event):
Return a dict mapping the aggregate names to None
dataset/ETHPy150Open twisted/imaginary/imaginary/iimaginary.py/ITransactionalEventBroadcaster.addRevertEvent--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/db/models/query.py/EmptyQuerySet.aggregate