static ActionListener actionListenerInNewThread(fO runnable) {
  ret actionListenerInNewThread(runnable, null);
}

static ActionListener actionListenerInNewThread(fO runnable, fO instanceToHold) {
  if (runnable instanceof ActionListener) ret (ActionListener) runnable;
  ret actionListener {
    thread "Action Listener" {
      temp holdInstance(instanceToHold);
      callF(runnable);
    }
  };
}