docs: protected ServletDelegate getDelegate(ServletConfig servletConfig)
     {
        ClassLoaderProvider clProvider = ClassLoaderProvider.getDefaultProvider();
        ClassLoader cl = clProvider.getWebServiceSubsystemClassLoader();
        ServiceLoader<ServletDelegateFactory> sl = ServiceLoader.load(ServletDelegateFactory.class, cl);
        ServletDelegateFactory factory = sl.iterator().next();
        return factory.newServletDelegate(servletConfig.getInitParameter(STACK_SERVLET_DELEGATE_CLASS));
     }