docs: public static CmsJspStandardContextBean getInstance(ServletRequest req) {
  
          Object attribute = req.getAttribute(ATTRIBUTE_NAME);
          CmsJspStandardContextBean result;
          if ((attribute != null) && (attribute instanceof CmsJspStandardContextBean)) {
              result = (CmsJspStandardContextBean)attribute;
          } else {
              result = new CmsJspStandardContextBean(req);
              req.setAttribute(ATTRIBUTE_NAME, result);
          }
          return result;
      }