return delegate().edgeConnectingOrNull(nodeV, nodeU); // transpose
    }

    @Override
    @CheckForNull
    public E edgeConnectingOrNull(EndpointPair<N> endpoints) {
      return delegate().edgeConnectingOrNull(transpose(endpoints));
    }

    @Override
    public boolean hasEdgeConnecting(N nodeU, N nodeV) {
      return delegate().hasEdgeConnecting(nodeV, nodeU); // transpose

     *      org.apache.maven.artifact.resolver.ResolutionNode)
     */

    public ResolutionNode resolveConflict(ResolutionNode node1, ResolutionNode node2) {
        return node1.getDepth() >= node2.getDepth() ? node1 : node2;
    }

        addNode(node1)
        removeNode(node1)
        bindings.add(rule)

        when:
        addNode(node2)

        then:
        bindings.getRulesWithSubject(nodeAtState("a", ModelNode.State.Finalized)) as List == [rule]
        rule.subjectBinding.boundTo == node2
    }

    def "can replace by-type subject when bound"() {
        def node1 = node("a", Long)
        def node2 = node("a", Long)

    }

    /**
     * Visits the "post-execution" nodes of this node. These nodes should be treated as though they also produce the outputs or
     * results of this node. That is, all nodes that depend on this node should also depend on these nodes. This method is called when
     * this node has executed successfully and before any of its dependents are started, allowing some work of this node to be dynamically split

     */

    public ResolutionNode resolveConflict(ResolutionNode node1, ResolutionNode node2) {
        try {
            ArtifactVersion version1 = node1.getArtifact().getSelectedVersion();
            ArtifactVersion version2 = node2.getArtifact().getSelectedVersion();

            return version1.compareTo(version2) > 0 ? node1 : node2;
        } catch (OverConstrainedVersionException exception) {

			mode:      SyncFromCloud,
			node:      nodeWithCIDRRange,
			events:    []fakeEvent{{"node1", "CloudCIDRAllocatorInvalidMode"}},
			wantError: true,
		},
		{
			desc: "update alias from node",
			mode: SyncFromCluster,
			node: nodeWithCIDRRange,
			// XXX/bowei -- validation
		},
		{
			desc: "update node from alias",
			mode: SyncFromCloud,
			node: nodeWithoutCIDRRange,

				Obj(),
			nodes: []*v1.Node{
				st.MakeNode().Name("node1").Capacity(map[v1.ResourceName]string{"cpu": "4000", "memory": "10000"}).Obj(),
				st.MakeNode().Name("node2").Capacity(map[v1.ResourceName]string{"cpu": "6000", "memory": "10000"}).Obj(),
			},
			existingPods: []*v1.Pod{
				st.MakePod().Node("node1").Req(map[v1.ResourceName]string{"cpu": "2000", "memory": "4000"}).Obj(),

     *      org.apache.maven.artifact.resolver.ResolutionNode)
     */

    public ResolutionNode resolveConflict(ResolutionNode node1, ResolutionNode node2) {
        return node1.getDepth() <= node2.getDepth() ? node1 : node2;
    }

     *
     * @param node1 the first artifact declaration
     * @param node2 the second artifact declaration
     * @return the artifact declaration to use: <code>node1</code>; <code>node2</code>; or <code>null</code>if
     *         this conflict cannot be resolved
     * @since 3.0
     */
    ResolutionNode resolveConflict(ResolutionNode node1, ResolutionNode node2);

// driver name from a Node object.
func removeNodeIDFromNode(csiDriverName string) nodeUpdateFunc {
	return func(node *v1.Node) (*v1.Node, bool, error) {
		var previousAnnotationValue string
		if node.ObjectMeta.Annotations != nil {
			previousAnnotationValue =
				node.ObjectMeta.Annotations[annotationKeyNodeID]
		}

		if previousAnnotationValue == "" {
			return node, false, nil