import java.util.Set;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
-import org.opendaylight.controller.config.util.xml.XmlUtil;
import org.opendaylight.netconf.api.NetconfClientSessionPreferences;
import org.opendaylight.netconf.api.NetconfDocumentedException;
import org.opendaylight.netconf.api.NetconfMessage;
import org.opendaylight.netconf.api.messages.NetconfHelloMessage;
import org.opendaylight.netconf.api.xml.XmlNetconfConstants;
+import org.opendaylight.netconf.api.xml.XmlUtil;
import org.opendaylight.netconf.nettyutil.AbstractChannelInitializer;
import org.opendaylight.netconf.nettyutil.AbstractNetconfSessionNegotiator;
import org.opendaylight.netconf.nettyutil.handler.exi.NetconfStartExiMessage;