srecord noeq ScreenSelectorRadioButtons(SimpleLiveValue<Int> lvScreenNr) {
  transient JRadioButtons screenSelectors;
  
  visual
    screenSelectors = jRadioButtons(
      countIteratorAsList(screenCount(), i -> "Screen " + (i+1)));
    selectRadioButton(radioButtons, lvScreenNr!);
    onRadioButtonChange(radioButtons, i -> lvScreenNr.set(i));
    ret jline(buttonsInGroup(radioButtons));
  }
}