def errback(self, ex):
        raise NotImplementedError
Retrieve all groups in this domain.
dataset/ETHPy150Open ncclient/ncclient/ncclient/transport/session.py/SessionListener.errback--crossover with--dataset/ETHPy150Open acil-bwh/SlicerCIP/Scripted/attic/PicasaSnap/gdata/apps/groups/client.py/GroupsProvisioningClient.retrieve_all_groups