static void addDirectMenuItem(JMenuBar mb, S text, O action) {
  if (mb != null) swing {
    addDirectMenuItem(mb, directJMenuItem(text, action));
  }
}

static void addDirectMenuItem(Component c, S text, O action) {
  addDirectMenuItem(addMenuBar(c), text, action);
}

svoid addDirectMenuItem(JMenuBar mb, JMenuItem menuItem) {
  if (mb != null) swing {
    mb.add(menuItem);
    revalidate(mb);
  }
}