public static function metro_sitemap_menu()
{
$page_hook = add_management_page(__('Sitemap', 'metro-sitemaps'), __('Sitemap', 'metro-sitemaps'), 'manage_options', 'metro-sitemap', array(__CLASS__, 'render_sitemap_options_page'));
add_action('admin_print_scripts-' . $page_hook, array(__CLASS__, 'add_admin_scripts'));
}