*/
    AuthenticationInfo getAuthenticationInfo(String id);

    ProxyInfo getProxy(String protocol);

    void getArtifact(Artifact artifact, ArtifactRepository repository)
            throws TransferFailedException, ResourceDoesNotExistException;

    void getArtifact(Artifact artifact, List<ArtifactRepository> remoteRepositories)
            throws TransferFailedException, ResourceDoesNotExistException;

     */

    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) {

        return retrieve(request.getArtifact(), request.getLocalRepository(), request.getRemoteRepositories());
    }

    public List<ArtifactVersion> retrieveAvailableVersions(MetadataResolutionRequest request)
            throws ArtifactMetadataRetrievalException {
        return retrieveAvailableVersions(
                request.getArtifact(), request.getLocalRepository(), request.getRemoteRepositories());
    }

     */

    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) {

    //
    // Retriever
    //
    void getArtifact(Artifact artifact, ArtifactRepository repository, TransferListener transferListener, boolean force)
            throws TransferFailedException, ResourceDoesNotExistException;

    void getArtifact(
            Artifact artifact,
            List<ArtifactRepository> remoteRepositories,

            Relocation relocation = distMgmt.getRelocation();
            if (relocation != null) {
                Artifact result = new RelocatedArtifact(
                        artifactDescriptorResult.getRequest().getArtifact(),
                        relocation.getGroupId(),
                        relocation.getArtifactId(),
                        null,
                        null,
                        relocation.getVersion(),

            @Override
            public Artifact getArtifact() {
                org.apache.maven.artifact.Artifact artifact =
                        delegate.getMojoDescriptor().getPluginDescriptor().getPluginArtifact();
                org.eclipse.aether.artifact.Artifact resolverArtifact = RepositoryUtils.toArtifact(artifact);
                return resolverArtifact != null ? session.getArtifact(resolverArtifact) : null;
            }

        RequestTrace trace = RequestTrace.newChild(request.getTrace(), request);

        LinkedHashSet<String> visited = new LinkedHashSet<>();
        for (Artifact a = request.getArtifact(); ; ) {
            Artifact pomArtifact = ArtifactDescriptorUtils.toPomArtifactUnconditionally(a);
            try {
                VersionRequest versionRequest =

        Model model = new Model();

        model.addDependency( dep );

        MavenProject project = new MavenProject( model, repositorySystem );

        project.setArtifacts( project.createArtifacts( null ) );

        String key = ArtifactUtils.versionlessKey( groupId, artifactId );

        Map artifactMap = project.getArtifactMap();

        this.project = project;

        artifact.setFile(project.getArtifact().getFile());
        artifact.setResolved(true);
    }

    /** {@inheritDoc} */
    public File getFile() {
        // we need to get the latest file for the project, not the artifact that was created at one point in time
        return project.getArtifact().getFile();
    }

    /** {@inheritDoc} */
    public String getGroupId() {