broadcaster.getBroadcasterConfig().addFilter(new DuplicateBroadcastProtectionFilter());
broadcaster.getBroadcasterConfig().addFilter(new ResponseObjectFilter());
stateChangeListener = new StateChangeListener() {
// don't react on update events
public void stateUpdated(Item item, State state) {
// if the group has a base item and thus might calculate its state
// as a DecimalType or other, we also consider it to be necessary to
// send an update to the client as the label of the item might have changed,