return null;
AccessibleStateSet state = super.getAccessibleStateSet();  if (getModel().isArmed()) state.add(AccessibleState.ARMED); if (getModel().isPressed()) state.add(AccessibleState.PRESSED); if (isSelected()) state.add(AccessibleState.CHECKED);  return state;
    public AccessibleStateSet getAccessibleStateSet()      throws NotImplementedException    {      return null; // TODO    }