def __init__(self, reactor, path):
        MultiService.__init__(self)
        self._path = path
        self._config_path = self._path.child(b"current_configuration.json")
        self._change_callbacks = []
        LeaseService(reactor, self).setServiceParent(self)
:param reactor: Reactor to use for thread pool.
dataset/ETHPy150Open ClusterHQ/flocker/flocker/control/_persistence.py/ConfigurationPersistenceService.__init__