/** @generated NOT */
 @Override
 public void deactivate() {
   PropertyHolder holder = (PropertyHolder) getNotationView().getElement();
   if (holder != null) {
     holder.eAdapters().remove(PropertyViewUpdater.INSTANCE);
   }
   super.deactivate();
 }
 /** @generated NOT */
 @Override
 public void activate() {
   super.activate();
   PropertyHolder holder = (PropertyHolder) getNotationView().getElement();
   if (holder != null) {
     holder.eAdapters().add(PropertyViewUpdater.INSTANCE);
   }
 }