private Logger logger;

    public WarningResolutionListener(Logger logger) {
        this.logger = logger;
    }

    public void testArtifact(Artifact node) {}

    public void startProcessChildren(Artifact artifact) {}

    public void endProcessChildren(Artifact artifact) {}

    public void includeArtifact(Artifact artifact) {}

    public void omitForNearer(Artifact omitted, Artifact kept) {}

    public DebugResolutionListener(Logger logger) {
        this.logger = logger;
    }

    public void testArtifact(Artifact node) {}

    public void startProcessChildren(Artifact artifact) {
        indent += "  ";
    }

    public void endProcessChildren(Artifact artifact) {
        indent = indent.substring(2);
    }

    public void includeArtifact(Artifact artifact) {

    int RESTRICT_RANGE = 11;

    int MANAGE_ARTIFACT_VERSION = 12;

    int MANAGE_ARTIFACT_SCOPE = 13;

    int MANAGE_ARTIFACT_SYSTEM_PATH = 14;

    void testArtifact(Artifact node);

    void startProcessChildren(Artifact artifact);

    void endProcessChildren(Artifact artifact);

    void includeArtifact(Artifact artifact);

    void omitForNearer(Artifact omitted, Artifact kept);

                    listener.testArtifact(node.getArtifact());
                    break;
                case ResolutionListener.PROCESS_CHILDREN:
                    listener.startProcessChildren(node.getArtifact());
                    break;
                case ResolutionListener.FINISH_PROCESSING_CHILDREN:
                    listener.endProcessChildren(node.getArtifact());
                    break;