static <A> void setComboBoxItems_notifyListeners(JComboBox<A> cb, Cl<A> items) {
  if (cb != null) swing {
    var sel = getSelectedItem_typed(cb);
    setComboBoxItems(cb, items);
    var item = getSelectedItem_typed(cb);
    if (!eq(sel, item)) {
      // force onChange event(s)
      setSelectedItem(cb, (A) null);
      setSelectedItem(cb, item);
    }
  }
}