* The identifier is composed of groupId, artifactId, extension, classifier, and version.
     *
     * @return the unique identifier
     */
    @Nonnull
    default String key() {
        return getGroupId()
                + ':'
                + getArtifactId()
                + ':'
                + getExtension()
                + (getClassifier().isEmpty() ? "" : ":" + getClassifier())
                + ':'

    }

    @Nonnull
    public org.eclipse.aether.graph.Dependency getDependency() {
        return dependency;
    }

    @Override
    public String getGroupId() {
        return dependency.getArtifact().getGroupId();
    }

    @Override
    public String getArtifactId() {
        return dependency.getArtifact().getArtifactId();
    }

    @Override
    public String getClassifier() {

        return result;
    }

    private static boolean artifactEquals(Artifact a1, Artifact a2) {
        if (a1 == a2) {
            return true;
        }

        return Objects.equals(a1.getGroupId(), a2.getGroupId())
                && Objects.equals(a1.getArtifactId(), a2.getArtifactId())
                && Objects.equals(a1.getType(), a2.getType())
                && Objects.equals(a1.getVersion(), a2.getVersion())

                    session,
                    new org.eclipse.aether.graph.Dependency(
                            new org.eclipse.aether.artifact.DefaultArtifact(
                                    request.getGroupId(),
                                    request.getArtifactId(),
                                    request.getClassifier(),
                                    request.getExtension(),

                new ArtifactRepositoryPolicy());
    }

    public Artifact createDependencyArtifact(Dependency dependency) {
        Artifact artifact = new DefaultArtifact(
                dependency.getGroupId(),
                dependency.getArtifactId(),
                dependency.getVersion(),
                dependency.getScope(),
                dependency.getType(),
                dependency.getClassifier(),

        return repository.getId();
    }

    private String getPath(Metadata metadata, String repositoryKey) {
        StringBuilder path = new StringBuilder(128);

        if (!metadata.getGroupId().isEmpty()) {
            path.append(metadata.getGroupId().replace('.', '/')).append('/');

            if (!metadata.getArtifactId().isEmpty()) {
                path.append(metadata.getArtifactId()).append('/');

        return repository.getId();
    }

    private String getPath(Metadata metadata, String repositoryKey) {
        StringBuilder path = new StringBuilder(128);

        if (!metadata.getGroupId().isEmpty()) {
            path.append(metadata.getGroupId().replace('.', '/')).append('/');

            if (!metadata.getArtifactId().isEmpty()) {
                path.append(metadata.getArtifactId()).append('/');

    }

    private Plugin findPlugin(String groupId, String artifactId, Collection<Plugin> plugins) {
        for (Plugin plugin : plugins) {
            if (artifactId.equals(plugin.getArtifactId()) && groupId.equals(plugin.getGroupId())) {
                return plugin;
            }
        }

        return null;
    }

    public static XmlNode convert(org.apache.maven.api.plugin.descriptor.MojoDescriptor mojoDescriptor) {

    DefaultPluginPrefixResult(Plugin plugin) {
        groupId = plugin.getGroupId();
        artifactId = plugin.getArtifactId();
    }

    DefaultPluginPrefixResult(String groupId, String artifactId, ArtifactRepository repository) {
        this.groupId = groupId;
        this.artifactId = artifactId;
        this.repository = repository;
    }

    public String getGroupId() {
        return groupId;
    }

            @Nonnull Session session, @Nonnull Parent parent, @Nonnull AtomicReference<Parent> modified)
            throws ModelResolverException {
        return resolveModel(
                session,
                parent.getGroupId(),
                parent.getArtifactId(),
                parent.getVersion(),
                version -> modified.set(parent.withVersion(version)));
    }

    /**