* @param response
* @return
*/
protected IPortletRenderExecutionWorker startPortletHeaderRenderInternal(IPortletWindowId portletWindowId, HttpServletRequest request, HttpServletResponse response) {
IPortletRenderExecutionWorker portletHeaderRenderWorker = this.portletWorkerFactory.createRenderHeaderWorker(request, response, portletWindowId);
portletHeaderRenderWorker.submit();
final Map<IPortletWindowId, IPortletRenderExecutionWorker> portletHeaderRenderingMap = this.getPortletHeaderRenderingMap(request);
portletHeaderRenderingMap.put(portletWindowId, portletHeaderRenderWorker);
return portletHeaderRenderWorker;