static void selectFromList(S title, L<S> items, VF1<S> onSelect) {
  final JList list = jlist(items);
  showFrame(title, centerAndSouthWithMargins(list,
    jcenteredline(listDependentButton("OK", r {
      fS item = getSelectedItem(list);
      if (item == null) ret;
      disableButtonWhileCalcing2(func -> bool {
        callF_returnTrueIfNoException(onSelect, item)
      });
    }, jbutton("Cancel", r { disposeWindow(heldInstance(JButton)) }))));
}