List<String> id_in = new ArrayList<String>();
id_in.add("jbond");
id_in.add("evil");
Holder<List<String>> inout = new Holder<List<String>>(id_in);
List<WSUser> response = proxy.echo(in, inout);
assertTrue(response != null);
assertTrue(response.size() == 2);
assertTrue("James Bond".equals(response.get(0).getUserID()));
assertTrue("Dr. Evil".equals(response.get(1).getUserID()));
List<String> id_out = inout.value;