Disable "powered by geomajas" watermark on a Geomajas MapWidget

gistfile1.java

public class Application implements EntryPoint {
...
	public void onModuleLoad() {
...
		final MapWidget map = new MapWidget("mapMain", "app") {
			@Override
			protected void initializationCallback(GetMapConfigurationResponse r) {
				super.initializationCallback(r);
				Map<String, MapAddon> mapAddons = getMapAddons();
				for (MapAddon addon : mapAddons.values()) {
					if (addon instanceof Watermark) {
						unregisterMapAddon(addon);
					}
				}
			}
		};