-import com.google.common.base.Optional;
-import com.google.common.base.Preconditions;
-import java.util.Collections;
-import org.opendaylight.controller.config.util.xml.DocumentedException;
-import org.opendaylight.controller.config.util.xml.XmlElement;
-import org.opendaylight.controller.config.util.xml.XmlUtil;
+import static java.util.Objects.requireNonNull;
+
+import java.util.Map;
+import org.opendaylight.netconf.api.DocumentedException;
+import org.opendaylight.netconf.api.xml.XmlElement;