}
        }
        return allProjects;
    }

    private Map<String, Map<String, Map<String, MavenProject>>> getProjects() {
        // compute the projects mapping
        if (projects == null) {
            List<MavenProject> projects = session.getProjects();
            if (projects != null) {
                Map<String, Map<String, Map<String, MavenProject>>> map = new HashMap<>();

        if (logger.isInfoEnabled() && event.getSession().getProjects().size() > 1) {
            init();
            infoLine('-');

            infoMain("Reactor Build Order:");

            logger.info("");

            final List<MavenProject> projects = event.getSession().getProjects();
            for (MavenProject project : projects) {
                int len = lineLength

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

            result = Result.success(graph);
        }

                return result;
            }

            result.setTopologicallySortedProjects(session.getProjects());

            result.setProject(session.getTopLevelProject());

            validatePrerequisitesForNonMavenPluginProjects(session.getProjects());

            validateRequiredProfiles(session, request.getProfileActivation());
            if (session.getResult().hasExceptions()) {

        when(projectStartedEvent1.getProject()).thenReturn(project1);
        ExecutionEvent projectStartedEvent2 = mock(ExecutionEvent.class);
        when(projectStartedEvent2.getProject()).thenReturn(project2);
        ExecutionEvent projectStartedEvent3 = mock(ExecutionEvent.class);
        when(projectStartedEvent3.getProject()).thenReturn(project3);

        // execute

    public Properties getSystemProperties() {
        return request.getSystemProperties();
    }

    public Settings getSettings() {
        return settings;
    }

    public List<MavenProject> getProjects() {
        return projects;
    }

    /**
     * @deprecated use {@link #getTopDirectory()} ()}
     */
    @Deprecated
    public String getExecutionRootDirectory() {

        InternalMavenSession mSession = InternalMavenSession.from(iSession);
        MavenSession session = mSession.getMavenSession();

        session.setProjects(projects);
        session.setAllProjects(session.getProjects());

        return session;
    }

    protected void initRepoSession(
            MavenExecutionRequest mavenExecutionRequest, ProjectBuildingRequest projectBuildingRequest)

            MavenSession session = legacySupport.getSession();
            if (session != null) {
                pomRepositories = session.getProjects().stream()
                        .filter(p -> artifact.equals(p.getArtifact()))
                        .map(MavenProject::getRemoteArtifactRepositories)
                        .findFirst()

        return null;
    }

    @Override
    public Path getRootDirectory() {
        throw new IllegalStateException();
    }

    @Override
    public List<Project> getProjects() {
        return List.of();
    }

    @Override
    public Map<String, Object> getPluginContext(Project project) {
        throw new UnsupportedInStandaloneModeException();
    }

    Path getRootDirectory();

    /**
     * Retrieves a list of projects associated with the session.
     *
     * @return a list of projects, never {@code null}
     */
    @Nonnull
    List<Project> getProjects();

    /**
     * Returns the plugin context for mojo being executed and the specified
     * {@link Project}, never returns {@code null} as if context not present, creates it.
     *