code: public void forward(ServletRequest req, ServletResponse res) throws ServletException, IOException {
  
          CmsFlexController controller = CmsFlexController.getController(req);
          controller.setForwardMode(true);
          m_rd.forward(req, res);
      }
docs: Wrapper for the standard servlet API call.<p>
  
  Forward calls are actually NOT wrapped by OpenCms as of now.
  So they should not be used in JSP pages or servlets.<p>
  
  @param req the servlet request
  @param res the servlet response
  @throws ServletException in case something goes wrong
  @throws IOException in case something goes wrong
  
  @see javax.servlet.RequestDispatcher#forward(javax.servlet.ServletRequest, javax.servlet.ServletResponse)