private Welcome sayHello(Greetee s) throws WsException, IOException {
SoapClient client = new SoapClient(m_location, m_fact);
client.addOutHeader(new Locale("fr"));
UnmarshallingInHandler headerHandler = new UnmarshallingInHandler(QOS.class);
client.addInHeaderHandler(headerHandler);
Welcome welcome = (Welcome) client.call(s);
System.out.println("QOS: " + headerHandler.getPayload());
return welcome;
}