code: public Service getService(AppContextWrapper sc) {
  		ContainerWrapper containerWrapper = containerFinder.findContainer(sc);
  		Service service = (Service) containerWrapper.lookup(ComponentKeys.WEBSERVICE);
  		return service;
  	}
docs: the applciation' code get the service instance, such as: XXXService
  xxxService = WeAppUtil.getService("xxxService");
  
  @return Returns the service.