@Override
 public RegistrationBean createRegistrationBean(
     String name, Servlet source, int totalNumberOfSourceBeans) {
   String url = (totalNumberOfSourceBeans == 1 ? "/" : "/" + name + "/");
   if (name.equals(DISPATCHER_SERVLET_NAME)) {
     url = "/"; // always map the main dispatcherServlet to "/"
   }
   ServletRegistrationBean bean = new ServletRegistrationBean(source, url);
   bean.setMultipartConfig(this.multipartConfig);
   return bean;
 }