docs: protected PortletRenderResult getPortletRenderResult(
              IPortletWindowId portletWindowId,
              HttpServletRequest request,
              HttpServletResponse response)
              throws Exception {
          final IPortletRenderExecutionWorker tracker =
                  getRenderedPortletBodyWorker(portletWindowId, request, response);
          final long timeout = getPortletRenderTimeout(portletWindowId, request);
          return tracker.get(timeout);
      }