@Override public <T> SubscriptionHandle subscribeToChildren(Map<String, Object> newFlags, Entity parent, Sensor<T> sensor, SensorEventListener<? super T> listener) { Map<String,Object> subscriptionFlags = Maps.newLinkedHashMap(flags); if (newFlags != null) subscriptionFlags.putAll(newFlags); return manager.subscribeToChildren(subscriptionFlags, parent, sensor, listener); }