Object handback = new Object();
NotificationFilterSupport filter = new NotificationFilterSupport();
filter.enableType(DEFAULT_TYPE);
broadcaster.addNotificationListener(listener, null, null);
broadcaster.addNotificationListener(listener, filter, handback);
broadcaster.removeNotificationListener(listener, filter, handback);
createNotification(broadcaster);
compare(sent, received(listener, null));
compare(EMPTY, received(listener, handback));