@Override
    public Artifact resolve(Plugin plugin, List<RemoteRepository> repositories, RepositorySystemSession session)
            throws PluginResolutionException {
        RequestTrace trace = RequestTrace.newChild(null, plugin);

        Artifact pluginArtifact = toArtifact(plugin, session);

        try {
            DefaultRepositorySystemSession pluginSession = new DefaultRepositorySystemSession(session);

        DomUtils.insertContentElement(customParent, "newChild", "new value");

        String xmlOutput = DomUtils.toXml(doc);

        // Should be appended at the end since no ordering is defined for customParent
        assertTrue(xmlOutput.contains("<newChild>new value</newChild>"), "Should contain new child element");

    private Model loadPom(
            RepositorySystemSession session, ArtifactDescriptorRequest request, ArtifactDescriptorResult result)
            throws ArtifactDescriptorException {
        RequestTrace trace = RequestTrace.newChild(request.getTrace(), request);

        LinkedHashSet<String> visited = new LinkedHashSet<>();
        for (Artifact a = request.getArtifact(); ; ) {

        return null;
    }

    private PluginPrefixResult resolveFromRepository(
            PluginPrefixRequest request, LinkedHashMap<String, Set<String>> candidates) {
        RequestTrace trace = RequestTrace.newChild(null, request);

        List<MetadataRequest> requests = new ArrayList<>();

        for (String pluginGroup : candidates.keySet()) {
            org.eclipse.aether.metadata.Metadata metadata =

            RepositorySystemSession session,
            VersionRangeResult result,
            VersionRangeRequest request,
            Metadata.Nature wantedNature) {
        RequestTrace trace = RequestTrace.newChild(request.getTrace(), request);

        Map<String, ArtifactRepository> versionIndex = new HashMap<>();

        Metadata metadata = new DefaultMetadata(
                request.getArtifact().getGroupId(),

        return result;
    }

    private PluginVersionResult resolveFromRepository(PluginVersionRequest request)
            throws PluginVersionResolutionException {
        RequestTrace trace = RequestTrace.newChild(null, request);

        DefaultPluginVersionResult result = new DefaultPluginVersionResult();

        org.eclipse.aether.metadata.Metadata metadata = new DefaultMetadata(
                request.getGroupId(),

    @Override
    public VersionResult resolveVersion(RepositorySystemSession session, VersionRequest request)
            throws VersionResolutionException {
        RequestTrace trace = RequestTrace.newChild(request.getTrace(), request);

        Artifact artifact = request.getArtifact();

        String version = artifact.getVersion();

        VersionResult result = new VersionResult(request);