import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.Timer;
import io.netty.util.concurrent.Promise;
+
import java.util.Collection;
+
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
+
import org.opendaylight.controller.netconf.api.NetconfClientSessionPreferences;
import org.opendaylight.controller.netconf.api.NetconfDocumentedException;
import org.opendaylight.controller.netconf.api.NetconfMessage;
+import org.opendaylight.controller.netconf.api.xml.XmlNetconfConstants;
import org.opendaylight.controller.netconf.nettyutil.AbstractChannelInitializer;
import org.opendaylight.controller.netconf.nettyutil.AbstractNetconfSessionNegotiator;
import org.opendaylight.controller.netconf.nettyutil.handler.exi.NetconfStartExiMessage;
import org.opendaylight.controller.netconf.util.messages.NetconfHelloMessage;
import org.opendaylight.controller.netconf.util.messages.NetconfMessageUtil;
import org.opendaylight.controller.netconf.util.xml.XMLNetconfUtil;
-import org.opendaylight.controller.netconf.util.xml.XmlNetconfConstants;
import org.opendaylight.controller.netconf.util.xml.XmlUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;