code: @Override
      public void startPortletRender(
              IPortletWindowId portletWindowId,
              HttpServletRequest request,
              HttpServletResponse response) {
          this.startPortletRenderInternal(portletWindowId, request, response);
      }
docs: /* (non-Javadoc)
  @see org.apereo.portal.portlet.rendering.IPortletExecutionManager#startPortletRender(org.apereo.portal.portlet.om.IPortletWindowId, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)