code: 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;
      }
docs: Creates a new instance of the standard JSP context bean.<p>
  
  To prevent multiple creations of the bean during a request, the OpenCms request context
  attributes are used to cache the created VFS access utility bean.<p>
  
  @param req the current servlet request
  
  @return a new instance of the standard JSP context bean