@Override
 public JComponent getPreferredFocusedComponent() {
   final Enumeration<AbstractButton> enumeration = myGroup.getElements();
   while (enumeration.hasMoreElements()) {
     final AbstractButton button = enumeration.nextElement();
     if (button.isSelected()) {
       return button;
     }
   }
   return myPanel;
 }
    public void actionPerformed(final ActionEvent ae) {
      AbstractButton btn = (AbstractButton) ae.getSource();

      System.out.println("Action 3 performed.");
      SharedActions.setActionSelected(SharedActions.ACTION4_KEY, btn.isSelected());
    }