}
@Override
protected List<AbstractLink> newSubMenuButtons(final String buttonMarkupId) {
final List<AbstractLink> subMenu = new ArrayList<AbstractLink>();
subMenu.add(new MenuHeader(Model.of("all available themes:")));
subMenu.add(new MenuDivider());
final IBootstrapSettings settings = Bootstrap.getSettings(getApplication());
final List<ITheme> themes = settings.getThemeProvider().available();