docs: public void useOldRESTServiceWithNewClient() throws Exception {
          List<Object> providers = createJAXRSProviders();
  
          org.customer.service.CustomerService customerService = JAXRSClientFactory
              .createFromModel("http://localhost:" + port + "/examples/direct/rest", 
                               org.customer.service.CustomerService.class,
                               "classpath:/model/CustomerService-jaxrs.xml", 
                               providers, 
                               null);
          
          // The outgoing new Customer data needs to be transformed for 
          // the old service to understand it and the response from the old service
          // needs to be transformed for this new client to understand it.
          ClientConfiguration config = WebClient.getConfig(customerService);
          addTransformInterceptors(config.getInInterceptors(),
                                   config.getOutInterceptors(),
                                   true);
          
          
          System.out.println("Using old RESTful CustomerService with new client");
  
          customer.v2.Customer customer = createNewCustomer("Smith New to Old REST");
          customerService.updateCustomer(customer);
          customer = customerService.getCustomerByName("Smith New to Old REST");
          printNewCustomerDetails(customer);
      }