menu(label: 'Options', underline: 0) {
      menu_item(:checkbutton, label: 'Enabled', underline: 0) {
        on('command') do
          @select_one_menu.children.each { |menu_item| menu_item.state = menu_item.state == 'disabled' ? 'normal' : 'disabled' }
          @select_multiple_menu.children.each { |menu_item| menu_item.state = menu_item.state == 'disabled' ? 'normal' : 'disabled' }