*/
    default void validateFileModel(Model model, ModelBuilderRequest request, ModelProblemCollector problems) {
        // do nothing
    }

    /**
     * Checks the specified (raw) model for missing or invalid values. The raw model is the file model + buildpom filter

        if (!VALID_MODEL_VERSIONS.contains(superModelVersion)) {
            // Maven 3.x is always using 4.0.0 version to load the supermodel, so
            // do the same when loading a dependency.  The model validator will also
            // check that field later.
            superModelVersion = "4.0.0";
        }

            } else {
                unresolvedOptionalSelectors.add(selector);
            }
        }

        if (!unresolvedOptionalSelectors.isEmpty()) {
            LOGGER.info("The requested optional projects {} do not exist.", unresolvedOptionalSelectors);
        }

        return resolvedOptionalProjects;
    }

    private List<MavenProject> getChildProjects(MavenProject parent, MavenExecutionRequest request) {

                        try {
                            ResolutionGroup rGroup;

                            Object childKey;
                            do {
                                childKey = child.getKey();

                                if (managedVersions.containsKey(childKey)) {

import org.slf4j.LoggerFactory;

@Singleton
@Named
public final class DefaultPluginValidationManager extends AbstractEventSpy implements PluginValidationManager {
    /**
     * The collection of "G:A" combinations that do NOT belong to Maven Core, hence, should be excluded from
     * "expected in provided scope" type of checks.
     */
    static final Collection<String> EXPECTED_PROVIDED_SCOPE_EXCLUSIONS_GA =

    sensitive the online state of the application, and that this state is
    currently wrong for execution.

    <<NOTE:>> Do we want to fail when we cannot bind a mojo to the lifecycle
    because of offline/online status? That would probably indicate that the user
    was trying to do something they cannot succeed at for now...so we probably

import static java.util.stream.Collectors.toSet;

/**
 * Container for storing the request from the user to activate or de-activate certain profiles and optionally fail the
 * build if those profiles do not exist.
 */
public class ProfileActivation {
    private final Map<String, ActivationSettings> activations = new HashMap<>();

    /**
     * Mimics the pre-Maven 4 "active profiles" list.

                final PrintStream projectStream = printStreams.get(projectBuild);
                ByteArrayOutputStream projectOs = streams.get(projectBuild);

                do {
                    synchronized (projectStream) {
                        try {
                            projectStream.wait(100);
                        } catch (InterruptedException e) {

License
-------
This code is under the [Apache License, Version 2.0, January 2004][license].

See the [`NOTICE`](./NOTICE) file for required notices and attributions.

Donations
---------
Do you like Apache Maven? Then [donate back to the ASF](https://www.apache.org/foundation/contributing.html) to support the development.

Quick Build
-------
If you want to bootstrap Maven, you'll need:
- Java 17+

patent, trademark, and attribution notices from the Source form of the Work, excluding those notices that do not pertain to any part of the Derivative Works; and (d) If the Work includes a "NOTICE" text file as part of its distribution, then any Derivative Works that You distribute must include a readable copy of the attribution notices contained within such NOTICE file, excluding those notices that do not pertain to any part of the Derivative Works, in at least one of the following places: within a NOTICE...