protected final TranslationController getController() {
   if (controller == null) {
     GeoServerApplication application = getGeoServerApplication();
     controller = TranslationController.get(application);
   }
   return controller;
 }
 protected final TranslationSession getTranslationSession() {
   GeoServerSession session = getSession();
   return TranslationController.getTranslationSession(session);
 }