public SOAPEnvelope getEchoSoapEnvelope() {
SOAPFactory omfactory = OMAbstractFactory.getSOAP11Factory();
SOAPEnvelope reqEnv = omfactory.getDefaultEnvelope();
reqEnv.declareNamespace("http://schemas.xmlsoap.org/soap/envelope/", "soapenv");
reqEnv.declareNamespace("http://www.w3.org/2001/XMLSchema", "xsd");
reqEnv.declareNamespace("http://schemas.xmlsoap.org/soap/encoding/",
"SOAP-ENC"); //xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"
reqEnv.declareNamespace("http://www.w3.org/2001/XMLSchema-instance", "xsi");
reqEnv.declareNamespace("http://soapinterop.org/xsd", "s");
reqEnv.declareNamespace("http://soapinterop.org/", "m");