Element root = XmlUtil.createElement(document, XmlNetconfConstants.DATA_KEY, Optional.<String>absent());
Element modulesElement = XmlUtil.createElement(document, XmlNetconfConstants.MODULES_KEY, Optional.of(XmlNetconfConstants.URN_OPENDAYLIGHT_PARAMS_XML_NS_YANG_CONTROLLER_CONFIG));
Element root = XmlUtil.createElement(document, XmlNetconfConstants.DATA_KEY, Optional.<String>absent());
Element modulesElement = XmlUtil.createElement(document, XmlNetconfConstants.MODULES_KEY, Optional.of(XmlNetconfConstants.URN_OPENDAYLIGHT_PARAMS_XML_NS_YANG_CONTROLLER_CONFIG));