JSONProvider provider = new JSONProvider();
provider.setIgnoreNamespaces(true);
provider.setInTransformElements(
Collections.singletonMap("Book", "{http://books}Book"));
MultipartsService client = JAXRSClientFactory.create(serviceURI,
MultipartsService.class,
Collections.singletonList(provider));
MultipartBody body = createMultipartBody();
System.out.println();
System.out.println("Posting Book attachments with a proxy");
MultipartBody bodyResponse = client.echoAttachment(body);
verifyMultipartResponse(bodyResponse);
}