public static Xopg_tag_itm New_js_file(Io_url src_url) {
   byte[] src = src_url.To_http_file_bry();
   return new Xopg_tag_itm(
       Tid__js_file,
       Gfh_tag_.Bry__script,
       src,
       null,
       Tag__type_js,
       Keyval_.new_("src", String_.new_u8(src)));
 }
 public static Xopg_tag_itm New_css_file(Io_url href_url) {
   byte[] href = href_url.To_http_file_bry();
   return new Xopg_tag_itm(
       Tid__css_file,
       Gfh_tag_.Bry__link,
       href,
       null,
       Tag__type_css,
       Tag__rel_stylesheet,
       Keyval_.new_("href", String_.new_u8(href)));
 }