def update_stale(self, now):
        with self.lock:
            for device in self.devices.values():
                if (device.track and device.last_update_home and
                        device.stale(now)):
                    device.update_ha_state(True)
Gets the service name used to look up the endpoint in the service
dataset/ETHPy150Open home-assistant/home-assistant/homeassistant/components/device_tracker/__init__.py/DeviceTracker.update_stale--crossover with--dataset/ETHPy150Open apache/libcloud/libcloud/common/openstack.py/OpenStackBaseConnection.get_service_name