* is a prerequisite of the given project.
     *
     * @param project The project whose upstream projects should be retrieved, must not be {@code null}.
     * @param transitive A flag whether to retrieve all direct and indirect upstream projects or just the immediate
     *            upstream projects.

        File pom1 = new File(pom0Basedir, "p1/pom.xml");

        // load everything...
        MavenProject project1 = getProjectWithDependencies(pom1);

        assertEquals(pom0Basedir, project1.getParent().getBasedir());
        System.out.println("Project " + project1.getId() + " " + project1);
        Set set = project1.getArtifacts();
        assertNotNull(set, "No artifacts");
        assertTrue(set.size() > 0, "No Artifacts");

        activeProjectSelectors.forEach(this::activateOptionalProject);
    }

    /**
     * Overwrites the inactive projects based on a pre-Maven 4 "inactive projects" list.
     * @param inactiveProjectSelectors A {@link List} of project selectors that must be deactivated.
     * @deprecated Use {@link #deactivateOptionalProject(String)} or {@link #deactivateRequiredProject(String)} instead.
     */
    @Deprecated

     * filtering. This causes build ordering issues in concurrent builders.
     */
    private List<MavenProject> applyFilter(
            Collection<? extends MavenProject> projects, boolean transitive, boolean upstream) {
        List<MavenProject> filtered = new ArrayList<>(projects.size());
        for (MavenProject project : projects) {
            if (whiteList.containsKey(project)) {

    }

    @Override
    public List<Project> getProjects(List<MavenProject> projects) {
        return projects == null ? null : map(projects, this::getProject);
    }

    @Override
    public Project getProject(MavenProject project) {
        return project != null && project.getBasedir() != null
                ? allProjects.computeIfAbsent(project.getId(), id -> new DefaultProject(this, project))
                : null;
    }

        for (MavenProject project : projects) {
            request.setArtifact(new ProjectArtifact(project));
            request.setArtifactDependencies(project.getDependencyArtifacts());
            request.setManagedVersionMap(project.getManagedVersionMap());
            request.setRemoteRepositories(project.getRemoteArtifactRepositories());

     * from any repository but are present among the set of specified projects will not cause an exception. Instead,
     * those unresolved artifacts will be returned in the result set, allowing the caller to take special care of
     * artifacts that haven't been build yet.
     *

            return new ArrayList<>();
        }
    }

    private Optional<MavenProject> findOptionalProjectBySelector(
            List<MavenProject> projects, File reactorDirectory, String selector) {
        return projects.stream()
                .filter(project -> isMatchingProject(project, selector, reactorDirectory))
                .findFirst();
    }

    File getBaseDirectoryFromRequest(MavenExecutionRequest request) {

  onlyIf("By default not in CI") {
    System.getenv("CI") == null
      || (project.hasProperty("containerTests") && project.property("containerTests").toString().toBoolean())
  }

  jvmArgs(
    "-Dokhttp.platform=$platform",
  )

  if (platform == "loom") {
    jvmArgs(
      "-Djdk.tracePinnedThreads=short",
    )
  }

  val javaToolchains = project.extensions.getByType<JavaToolchainService>()

 * the {@code /project/modules/module} elements of the POM in the aggregator project.
 * Note that the aggregator project is required to have a {@code pom} packaging.</p>
 *
 * <p><dfn>Project inheritance</dfn> defines a parent-child relationship between projects.
 * The <dfn>child project</dfn> will inherit all the information from the <dfn>parent project</dfn>
 * POM.</p>
 *
 */