protected void initResourceBundle(UIDefaults table) {
   // The following line of code does not work, when Quaqua has been loaded with
   // a custom class loader. That's why, we have to inject the labels
   // by ourselves:
   // table.addResourceBundle( "ch.randelshofer.quaqua.Labels" );
   ResourceBundle bundle =
       ResourceBundle.getBundle(
           "ch.randelshofer.quaqua.Labels", Locale.getDefault(), getClass().getClassLoader());
   for (Enumeration i = bundle.getKeys(); i.hasMoreElements(); ) {
     String key = (String) i.nextElement();
     table.put(key, bundle.getObject(key));
   }
 }