@Override
 protected void doSetValue(Object value) {
   for (final RadioItem i : myRadioGroup.getItems()) {
     if (i.getText().equals(value)) {
       myRadioGroup.setSelection(i);
       return;
     }
   }
 }
 @Override
 protected Object doGetValue() {
   final RadioItem selection = myRadioGroup.getSelection();
   if (selection == null) return null;
   return selection.getText();
 }