SoapVersion soapVersion = Soap11.getInstance();
writer.setPrefix("soap", soapVersion.getNamespace());
writer.writeStartElement("soap",
soapVersion.getEnvelope().getLocalPart(),
soapVersion.getNamespace());
writer.writeNamespace("soap", soapVersion.getNamespace());
Object[] headerInfo = prepareSOAPHeader();
StaxUtils.writeElement((Element) headerInfo[1], writer, true, false);
writer.writeEndElement();