docs: public static boolean isOverlay(Element element) {
  
          for (String overlayClass : Arrays.asList(
              I_CmsLayoutBundle.INSTANCE.containerpageCss().expiredOverlay(),
              CmsElementOptionBar.CSS_CLASS)) {
              if (element.hasClassName(overlayClass)) {
                  return true;
              }
          }
          return false;
  
      }