@Override
    public ModelSource resolveModel(final Parent parent, AtomicReference<Parent> modified)
            throws UnresolvableModelException {
        Result result;
        try {
            Future<Result> future = parentCache.computeIfAbsent(parent.getId(), id -> {
                ForkJoinPool pool = new ForkJoinPool(MAX_CAP);
                ForkJoinTask<Result> task = new ForkJoinTask<>() {
                    Result result;

            return getProjectAExecutionPlan();
        }
        if (project.equals(ProjectDependencyGraphStub.B)) {
            return getProjectBExecutionPlan();
        }
        // The remaining are basically "for future expansion"
        List<MojoExecution> me = new ArrayList<>();
        me.add(createMojoExecution("resources", "default-resources", PROCESS_RESOURCES));
        me.add(createMojoExecution("compile", "default-compile", COMPILE));

        if (layout == null) {
            layout = new UnknownRepositoryLayout(id, layouts.get("default"));
        }

        return layout;
    }

    /**
     * In the future, the legacy system might encounter repository types for which no layout components exists because
     * the actual communication with the repository happens via a repository connector. As a minimum, the legacy system

    }

    @Test
    void testFutureModelVersion() throws Exception {
        File f1 = getTestFile("src/test/resources/projects/future-model-version-pom.xml");

        ProjectBuildingException e = assertThrows(
                ProjectBuildingException.class, () -> getProject(f1), "Expected to fail for future versions");
        assertThat(e.getMessage(), containsString("Building this project requires a newer version of Maven"));
    }

                    // don't stop processing in case a future segment explicitly excludes this repo
                }
                // check for external:http:*
                else if (EXTERNAL_HTTP_WILDCARD.equals(repo) && isExternalHttpRepo(originalRepository)) {
                    result = true;
                    // don't stop processing in case a future segment explicitly excludes this repo

                    "Cannot read metadata from '" + mappingFile + "': " + e.getMessage(), e);
        }
    }

    /**
     * Ensures the last updated timestamp of the specified metadata does not refer to the future and fixes the local
     * metadata if necessary to allow proper merging/updating of metadata during deployment.
     */
    private void fixTimestamp(File metadataFile, Metadata metadata, Metadata reference) {

          <association>
            <type>Repository</type>
            <multiplicity>*</multiplicity>
          </association>
          <comment>
            This may be removed or relocated in the near
            future. It is undecided whether plugins really need a remote
            repository set of their own.
          </comment>
        </field>
        <field xdoc.separator="blank">
          <name>profiles</name>

          <association>
            <type>Repository</type>
            <multiplicity>*</multiplicity>
          </association>
          <comment><![CDATA[ This may be removed or relocated in the near
            future. It is undecided whether plugins really need a remote
            repository set of their own. ]]></comment>
        </field>
      </fields>
    </class>
    <class>
      <name>Activation</name>

            } finally {
                if (downloadMonitor != null) {
                    wagon.removeTransferListener(downloadMonitor);
                }
            }

            // Pre-store the checksums as any future puts will overwrite them
            for (String extension : checksums.keySet()) {
                ChecksumObserver observer = checksums.get(extension);
                sums.put(extension, observer.getActualChecksum());

        for (String pluginGroup : request.getPluginGroups()) {
            org.eclipse.aether.metadata.Metadata metadata =
                    new DefaultMetadata(pluginGroup, "maven-metadata.xml", DefaultMetadata.Nature.RELEASE_OR_SNAPSHOT);

            requests.add(new MetadataRequest(metadata, null, REPOSITORY_CONTEXT).setTrace(trace));

            for (RemoteRepository repository : request.getRepositories()) {