{
NotificationBroadcasterSupport broadcaster = new NotificationBroadcasterSupport();
Listener listener = new Listener();
Object handback = new Object();
NotificationFilterSupport filter = new NotificationFilterSupport();
filter.enableType(DEFAULT_TYPE);
broadcaster.addNotificationListener(listener, filter, handback);
broadcaster.addNotificationListener(listener, filter, handback);
broadcaster.removeNotificationListener(listener, filter, handback);
broadcaster.removeNotificationListener(listener, filter, handback);