+import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.optional.rev190614.NetconfNodeFieldsOptional;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.optional.rev190614.netconf.node.fields.optional.Topology;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.optional.rev190614.netconf.node.fields.optional.TopologyKey;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.optional.rev190614.netconf.node.fields.optional.topology.Node;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.optional.rev190614.netconf.node.fields.optional.topology.NodeKey;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.optional.rev190614.netconf.node.fields.optional.topology.node.DatastoreLock;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.NetconfNode;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.netconf.node.topology.rev150114.NetconfNodeConnectionStatus.ConnectionStatus;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
+import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TopologyId;
+import org.opendaylight.yangtools.concepts.ListenerRegistration;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;