code: protected StaticFsServiceFactory createServiceFactory(ServletConfig config)
  	{
  		StaticFsServiceFactory staticFsServiceFactory = new StaticFsServiceFactory();
  		DefaultFsService fsService = createFsService();
  
  		staticFsServiceFactory.setFsService(fsService);
  		return staticFsServiceFactory;
  	}
docs: create a service factory
  
  @param config
  @return