static <A extends JCheckBox> A looselyBindLiveValueToCheckBox(A cb, IVarWithNotify<Bool> lv) {
  onChange(cb, (Runnable) () -> lv.set(isChecked(cb)));
  bindToComponent(cb, -> {
    var value = lv!;
    if (value != null)
      setChecked(cb, value);
    else
      lv.set(isChecked(cb));
  });
  ret cb;
}

static <A extends JCheckBox> A looselyBindLiveValueToCheckBox(IVarWithNotify<Bool> lv, A cb) {
  ret looselyBindLiveValueToCheckBox(cb, lv);
}

Began life as a copy of #1017125