if (extensionRecord == null) {
            ClassRealm extensionRealm = classRealmManager.createExtensionRealm(plugin, toAetherArtifacts(artifacts));

            // TODO figure out how to use the same PluginDescriptor when running mojos

            PluginDescriptor pluginDescriptor = null;
            if (plugin.isExtensions() && !artifacts.isEmpty()) {

          <description>The name of the file that must exist to activate the profile.</description>
        </field>
      </fields>
    </class>
    <!--
    This can be put back in when we figure out how to have multiple model versions
    <class>
      <name>ActivationCustom</name>
      <version>4.1.0+</version>

                    .collect(Collectors.toList());
            try {
                List<Future<InterimResult>> futures = executor.invokeAll(tasks);
                List<InterimResult> list = new ArrayList<>();
                for (Future<InterimResult> future : futures) {
                    InterimResult interimResult = future.get();
                    list.add(interimResult);
                }
                return list;

    @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;

        File artifactFile = new File(repository.getBasedir(), path);

        if (artifactFile.exists()) {
            if (!artifactFile.delete()) {
                throw new IOException("Failure while attempting to delete artifact " + artifactFile);
            }
        }
    }

    protected DefaultRepositorySystemSession initRepoSession() throws Exception {

        wagonManager.getArtifact(artifact, repo, null, false);

        wagon.clearExpectedContent();
        wagon.addExpectedContent("path", "expected-failure");
        wagon.addExpectedContent("path.sha1", "b7bb97d7d0b9244398d9b47296907f73313663e6");
        assertThrows(
                ChecksumFailedException.class,