.expectResult(MavenExecutionException.class, "empty reactor"),
                scenario("Excluded aggregator, but selected child")
                        .activeRequiredProjects(MODULE_C_1)
                        .inactiveRequiredProjects(MODULE_C)
                        .expectResult(MavenExecutionException.class, "empty reactor"),

            // Verify correct behavior for reactor parent:
            // - groupId should be removed (child has no explicit groupId, parent is in reactor)
            // - artifactId should be removed (can be inferred from relativePath)
            // - version should be removed (child has no explicit version, parent is in reactor)
            assertNull(parentElement.child("groupId").orElse(null));

         *
         * @param step The build step to process
         */
        private void processStep(BuildStep step) {
            // 1. Apply reactor failure behavior to decide whether to schedule or skip
            ReactorBuildStatus status = reactorContext.getReactorBuildStatus();
            boolean isAfterStep = step.name.startsWith(AFTER);

    //
    // 4) Create MavenSession.
    //
    // 5) Execute AbstractLifecycleParticipant.afterSessionStart(session)
    //
    // 6) Get reactor projects looking for general POM errors
    //
    // 7) Create ProjectDependencyGraph using trimming which takes into account --projects and reactor mode.
    // This ensures that the projects passed into the ReactorReader are only those specified.
    //

              <bomDescription>Bill Of Materials for Apache Maven - Maven JARS only</bomDescription>
              <outputFilename>maven-skinny-bom.xml</outputFilename>
              <reactorDependencies>REACTOR</reactorDependencies>
              <transitiveDependencies>NONE</transitiveDependencies>
              <usePropertiesForVersion>true</usePropertiesForVersion>
              <attach>true</attach>
            </configuration>

        projects = new ProjectSorter(projects).getSortedProjects();

        assertEquals(parentProject, projects.get(0));

        // the order of these two is non-deterministic, based on when they're added to the reactor.
        assertTrue(projects.contains(pluginProject), "Expected " + projects + " to contain " + pluginProject);
        assertTrue(
                projects.contains(pluginLevelDepProject),

                                + "plugin extension which still needed to be built. This is not possible within the same "
                                + "reactor build. Another project collection strategy will be executed as result.",
                        System.lineSeparator());
                return Collections.emptyList();
            }

            throw e;
        }

        hasChanges |= trimParentElementLimited(context, root, parentElement);

        // Only remove parent elements if the parent is in the same reactor (not external)
        if (isParentInReactor(parentElement, pomMap, context)) {
            // Remove parent groupId if child has no explicit groupId
            if (childGroupId == null) {

    }

    List<Project> getProjects(List<org.apache.maven.project.MavenProject> projects);

    /**
     * May return null if the input project is null or is not part of the reactor.
     */
    @Nullable
    Project getProject(org.apache.maven.project.MavenProject project);

    List<org.apache.maven.artifact.repository.ArtifactRepository> toArtifactRepositories(

import org.apache.maven.artifact.repository.MavenArtifactRepository;
import org.apache.maven.artifact.repository.layout.ArtifactRepositoryLayout;

/**
 * Delegating local artifact repository chains the reactor, IDE workspace
 * and user local repository.
 */
@Deprecated
public class DelegatingLocalArtifactRepository extends MavenArtifactRepository {
    private LocalArtifactRepository buildReactor;