static JList showList(L<S> l) {
  ret showList(l, autoFrameTitle());
}
  
static JList showList(S title, L<S> l) {
  ret showList(l, title);
}

static JList showList(L<S> l, S title) {
  ret showList(l, title, null);
}

static JList showList(JList list, L<S> l) {
  ret showList(l, autoFrameTitle(), list);
}

static JList showList(L<S> l, S title, JList list) {
  bool isNew = list == null;
  if (isNew) list = jlist();
  fillListWithStrings(list, l);
  if (isNew)
    showFrame(title, list);
  return list;
}