docs: public void useOldRESTService() throws Exception {
          List<Object> providers = createJAXRSProviders();
  
          com.example.customerservice.CustomerService customerService = JAXRSClientFactory
              .createFromModel("http://localhost:" + port + "/examples/direct/rest", 
                               com.example.customerservice.CustomerService.class,
                               "classpath:/model/CustomerService-jaxrs.xml", 
                               providers, 
                               null);
  
          System.out.println("Using old RESTful CustomerService with old client");
  
          customer.v1.Customer customer = createOldCustomer("Smith Old REST");
          customerService.updateCustomer(customer);
  
          customer = customerService.getCustomerByName("Smith Old REST");
          printOldCustomerDetails(customer);
      }