* Generates the model for the callbacks.
*/
protected Document createDOMDocumentForCallbackHandler() {
Document doc = getEmptyDocument();
WSDLInterface boundInterface = infoHolder.getPorttype();
WSDLBinding axisBinding = infoHolder.getBinding();
Element rootElement = doc.createElement("callback");
addAttribute(doc, "package", configuration.getPackageName(), rootElement);
addAttribute(doc, "name", getCoreClassName(boundInterface) + CALL_BACK_HANDLER_SUFFIX, rootElement);
addAttribute(doc, "namespace", boundInterface.getName().getNamespaceURI(), rootElement);