private PluginValidationIssues() {
            this.pluginDeclarations = new LinkedHashSet<>();
            this.pluginIssues = new HashMap<>();
            this.mojoIssues = new HashMap<>();
        }

        private synchronized void reportPluginIssue(
                IssueLocality issueLocality, String pluginDeclaration, String issue) {

import java.util.Set;

class Graph {

    final Map<String, Set<String>> graph = new LinkedHashMap<>();

    synchronized void addEdge(String from, String to) throws CycleDetectedException {
        if (graph.computeIfAbsent(from, l -> new HashSet<>()).add(to)) {
            List<String> cycle = visitCycle(graph, Collections.singleton(to), new HashMap<>(), new LinkedList<>());
            if (cycle != null) {

            if (allProjects != null) {
                Map<String, Map<String, Map<String, MavenProject>>> map = new HashMap<>();
                allProjects.forEach(project -> map.computeIfAbsent(project.getGroupId(), k -> new HashMap<>())
                        .computeIfAbsent(project.getArtifactId(), k -> new HashMap<>())
                        .put(project.getVersion(), project));
                this.allProjects = map;

                versioning.release(recessive.getVersioning().getRelease());
            }

            Collection<String> versions =
                    new LinkedHashSet<>(recessive.getVersioning().getVersions());
            versions.addAll(original.getVersions());
            versioning.versions(new ArrayList<>(versions));
        }

        metadata = metadata.withVersioning(versioning.build());

        // just carry-on as-is

    @BeforeEach
    void setUp() throws Exception {
        policy = new DefaultGraphConflictResolutionPolicy();
        e1 = new MetadataGraphEdge("1.1", true, null, null, 2, 1);
        e2 = new MetadataGraphEdge("1.2", true, null, null, 3, 2);
        e3 = new MetadataGraphEdge("1.2", true, null, null, 2, 3);
    }

            s = file.getAbsolutePath();
        } else {
            // an ordinary relative path, align with project directory
            s = new File(new File(basedir, s).toURI().normalize()).getAbsolutePath();
        }

        return s;
    }

    private String stripBasedirToken(String s) {
        if (s != null) {

    }

    @Override
    public Set<Entry<String, String>> entrySet() {
        return new AbstractSet<Entry<String, String>>() {
            @Override
            public Iterator<Entry<String, String>> iterator() {
                Iterator<Entry<Object, Object>> iterator = properties.entrySet().iterator();
                return new Iterator<Entry<String, String>>() {
                    Entry<String, String> next;

        try {
            Map<Artifact, Path> paths = new HashMap<>();
            ArtifactManager artifactManager = session.getService(ArtifactManager.class);
            List<RemoteRepository> repositories = session.toRepositories(session.getRemoteRepositories());
            List<ArtifactRequest> requests = new ArrayList<>();
            for (ArtifactCoordinate coord : request.getCoordinates()) {

            managedDependencies = request.getManagedDependencies();
            remoteRepositories = session.getRemoteRepositories();
        }
        CollectRequest collectRequest = new CollectRequest()
                .setRootArtifact(rootArtifact != null ? session.toArtifact(rootArtifact) : null)
                .setRoot(root != null ? session.toDependency(root, false) : null)

        }

        // Lifecycles cannot be cached as extensions might add custom lifecycles later in the execution.
        try {
            Map<String, Lifecycle> lifecycles = new HashMap<>(lookup.lookupMap(Lifecycle.class));
            for (org.apache.maven.api.Lifecycle lf : registry) {
                lifecycles.put(lf.id(), new Lifecycle(registry, lf));
            }