lifecycleDebugLogger.debugProjectPlan(project, executionPlan);

        if (session.getRequest().getDegreeOfConcurrency() > 1
                && session.getProjects().size() > 1) {
            final Set<Plugin> unsafePlugins = executionPlan.getNonThreadSafePlugins();
            if (!unsafePlugins.isEmpty()) {
                for (String s : MultilineMessageHelper.format(

        projectParent.setCollectedProjects(singletonList(projectModuleD));

        // Set up needed mocks
        when(session.getRequest()).thenReturn(mavenExecutionRequest);
        when(session.getProjects()).thenReturn(null); // needed, otherwise it will be an empty list by default
        when(mavenExecutionRequest.getProjectBuildingRequest()).thenReturn(mock(ProjectBuildingRequest.class));

            return;
        }

        alreadyPlannedExecutions.add(mojoDescriptor);

        List<MavenProject> forkedProjects =
                LifecycleDependencyResolver.getProjects(project, session, mojoDescriptor.isAggregator());

        for (MavenProject forkedProject : forkedProjects) {
            if (forkedProject != project) {

            this.session = session;
            this.reactorContext = reactorContext;
            this.threads = Math.min(
                    session.getRequest().getDegreeOfConcurrency(),
                    session.getProjects().size());
            // Propagate the parallel flag to the root session
            session.setParallel(threads > 1);

                    project.setFile(pomFile != null ? pomFile.toFile() : null);

                    boolean reactorMember = pomFile != null
                            && session.getProjects() != null // this is for UTs
                            && session.getProjects().stream()
                                    .anyMatch(
                                            p -> p.getPomPath().toAbsolutePath().equals(pomFile.toAbsolutePath()));

    /**
     * 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.
     *