docs: public void init(PageContext context, HttpServletRequest req, HttpServletResponse res) {
  
          m_controller = CmsFlexController.getController(req);
          if (m_controller == null) {
              handleMissingFlexController();
          }
          m_context = context;
          m_request = req;
          m_response = res;
          m_isNotInitialized = false;
      }