throws CycleDetectedException, DuplicateProjectException {
        Result<ProjectDependencyGraph> result = null;

        if (session.getProjectDependencyGraph() != null || session.getProjects() != null) {
            ProjectDependencyGraph graph = new DefaultProjectDependencyGraph(session.getAllProjects());
            if (session.getProjects() != null) {

    private boolean isSingleVersionedReactor(MavenSession session) {
        boolean result = true;

        MavenProject topProject = session.getTopLevelProject();
        List<MavenProject> sortedProjects = session.getProjectDependencyGraph().getSortedProjects();
        for (MavenProject mavenProject : sortedProjects) {
            if (!topProject.getVersion().equals(mavenProject.getVersion())) {
                result = false;
                break;

        String pluginKey = plugin.getPluginLookupKey();

        return pluginContextsByKey.computeIfAbsent(pluginKey, k -> new ConcurrentHashMap<>());
    }

    public ProjectDependencyGraph getProjectDependencyGraph() {
        return projectDependencyGraph;
    }

    public void setProjectDependencyGraph(ProjectDependencyGraph projectDependencyGraph) {
        this.projectDependencyGraph = projectDependencyGraph;