def _siblings(self):

        return [self.root] + [slave.root for slave in self.slaves]
like setattribute, but values persist
dataset/ETHPy150Open openstack/rack/rack/api/xmlutil.py/MasterTemplate._siblings--crossover with--dataset/ETHPy150Open OrbitzWorldwide/droned/droned/lib/droned/applications/__init__.py/StorageMixin.persist