private Logger logger;

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

    @Override
    public void testArtifact(Artifact node) {}

    @Override
    public void startProcessChildren(Artifact artifact) {}

    @Override
    public void endProcessChildren(Artifact artifact) {}

    @Override

    private static Set<Artifact> ignoredArtifacts = new HashSet<>();

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

    @Override
    public void testArtifact(Artifact node) {}

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

    @Override
    public void endProcessChildren(Artifact artifact) {

            Artifact replacement,
            VersionRange newRange) {
        for (ResolutionListener listener : listeners) {
            switch (event) {
                case ResolutionListener.TEST_ARTIFACT:
                    listener.testArtifact(node.getArtifact());
                    break;
                case ResolutionListener.PROCESS_CHILDREN:
                    listener.startProcessChildren(node.getArtifact());