def node_group_add(self, context, cluster, values):
        values = copy.deepcopy(values)
        values = self._populate_node_group(context, values)
        values['tenant_id'] = context.tenant_id
        return self.db.node_group_add(context, cluster, values)
Use a length prefixed protocol to give the length of a pickled
dataset/ETHPy150Open openstack/sahara/sahara/conductor/manager.py/ConductorManager.node_group_add--crossover with--dataset/ETHPy150Open bfrog/whizzer/whizzer/rpc/picklerpc.py/PickleProtocol.data