return builder()
                .session(requireNonNull(session, "session cannot be null"))
                .groupId(requireNonNull(coordinates, "coordinates cannot be null")
                        .getGroupId())
                .artifactId(coordinates.getArtifactId())
                .version(coordinates.getVersionConstraint().toString())
                .classifier(coordinates.getClassifier())

            return model.getId();
        }

        return "";
    }

    static String getGroupId(Model model) {
        String groupId = model.getGroupId();
        if (groupId == null && model.getParent() != null) {
            groupId = model.getParent().getGroupId();
        }
        return groupId;
    }

    static String getVersion(Model model) {

     *
     * @return The extension id in the form {@code <groupId>:<artifactId>:<version>}, never {@code null}.
     */
    public String getId() {
        return (getGroupId() == null ? "[unknown-group-id]" : getGroupId())
            + ":" + (getArtifactId() == null ? "[unknown-artifact-id]" : getArtifactId())
            + ":" + (getVersion() == null ? "[unknown-version]" : getVersion());
    }
            ]]>

        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())

        if (RELEASE.equals(version)) {
            metadata = new DefaultMetadata(
                    artifact.getGroupId(), artifact.getArtifactId(), MAVEN_METADATA_XML, Metadata.Nature.RELEASE);
        } else if (LATEST.equals(version)) {
            metadata = new DefaultMetadata(
                    artifact.getGroupId(),
                    artifact.getArtifactId(),
                    MAVEN_METADATA_XML,

    }

    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) {

/**
 * Test sorting projects by dependencies.
 *
 */
class ProjectSorterTest {
    private Parent createParent(MavenProject project) {
        return createParent(project.getGroupId(), project.getArtifactId(), project.getVersion());
    }

    private Parent createParent(String groupId, String artifactId, String version) {
        Parent plugin = new Parent();
        plugin.setGroupId(groupId);

                if (deployBuildPom) {
                    // Add the main POM as a build POM with "build" classifier
                    result.add(new DefaultArtifact(
                            main.getGroupId(),
                            main.getArtifactId(),
                            BUILD_POM_CLASSIFIER,
                            main.getExtension(),
                            main.getVersion(),

    }

    @Override
    public void configure(MavenProject project, MojoExecution mojoExecution, boolean allowPluginLevelConfig) {
        String g = mojoExecution.getPlugin().getGroupId();

        String a = mojoExecution.getPlugin().getArtifactId();

        Plugin plugin = findPlugin(g, a, project.getBuildPlugins());

        if (plugin == null && project.getPluginManagement() != null) {

    private final Artifact artifact;

    ArtifactClassRealmConstituent(Artifact artifact) {
        this.artifact = artifact;
    }

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

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

    @Override
    public String getType() {