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

static ActionListener actionListener(fO runnable, fO instanceToHold) {
  if (runnable instanceof ActionListener) ret (ActionListener) runnable;
  fO info = _threadInfo();
  ret actionListener {
    _threadInheritInfo(info);
    temp holdInstance(instanceToHold);
    pcallF(runnable);
  };
}