Holder<DataHandler> attachmentINOUT_Holder = new Holder<DataHandler>();
attachmentINOUT_Holder.value = attachmentINOUT;
Holder<String> response_Holder = new Holder<String>();
Holder<String> attachmentOUT_Holder = new Holder<String>();
proxy.echo(request, attachmentIN, attachmentINOUT_Holder, response_Holder,
attachmentOUT_Holder);
assertTrue("Bad Response Holder", response_Holder != null);
assertTrue("Response value is null", response_Holder.value != null);
assertTrue("Response is not the same as request. Receive="+response_Holder.value,