}

    static Model transform(Model model, MavenProject project) {
        String packaging = model.getPackaging();
        if (POM_PACKAGING.equals(packaging)) {
            // raw to consumer transform
            model = model.withRoot(false).withModules(null);
            if (model.getParent() != null) {
                model = model.withParent(model.getParent().withRelativePath(null));
            }

     */
    void validateRawModel(Model model, ModelBuilderRequest request, ModelProblemCollector problems);

    /**
     * Checks the specified (effective) model for missing or invalid values. The effective model is fully assembled and
     * has undergone inheritance, interpolation and other model operations.
     *
     * @param model The model to validate, must not be {@code null}.

import org.apache.maven.api.di.Singleton;
import org.apache.maven.api.model.DistributionManagement;
import org.apache.maven.api.model.Model;
import org.apache.maven.api.model.Scm;
import org.apache.maven.api.model.Site;
import org.apache.maven.api.services.ModelBuilderRequest;
import org.apache.maven.api.services.model.ModelUrlNormalizer;
import org.apache.maven.api.services.model.UrlNormalizer;

/**

        private volatile boolean set;
        private volatile Model model;

        Holder() {}

        Holder(Model model) {
            this.model = Objects.requireNonNull(model);
            this.set = true;
        }

        public static Model deref(Holder holder) {
            return holder != null ? holder.get() : null;
        }

        public Model get() {
            if (!set) {

            @Override
            public Model getRawModel(Path from, String gId, String aId) {
                Model model = findRawModel(from, gId, aId);
                if (model != null) {
                    context.modelByGA.put(new GAKey(gId, aId), new Holder(model));
                    context.modelByPath.put(model.getPomFile(), new Holder(model));
                }
                return model;
            }

            @Override

import org.apache.maven.api.services.ModelProblem;

/**
 * Collects the output of the model builder.
 *
 */
class DefaultModelBuilderResult implements ModelBuilderResult {
    private Model fileModel;
    private Model activatedFileModel;

    private Model effectiveModel;

    private List<String> modelIds;

    private Map<String, Model> rawModels;

    private Map<String, List<Profile>> activePomProfiles;

            Model model = new Model();
            model.setModelVersion("4.0.0");
            model.setGroupId(groupId);
            model.setArtifactId(artifactId);
            model.setVersion(version);
            model.setBuild(new Build());
            project = new MavenProject(model);
        }

        public ProjectBuilder setGroupId(String groupId) {

 *
 */
public class ModelResolverException extends MavenException {

    /**
     * The group id of the unresolvable model.
     */
    private final String groupId;

    /**
     * The artifact id of the unresolvable model.
     */
    private final String artifactId;

    /**
     * The version of the unresolvable model.
     */
    private final String version;

    @Override
    public Model injectManagement(Model model, ModelBuilderRequest request, ModelProblemCollector problems) {
        return merger.mergeManagedDependencies(model);
    }

    /**
     * ManagementModelMerger
     */
    protected static class ManagementModelMerger extends MavenModelMerger {

        public Model mergeManagedDependencies(Model model) {

     *
     * @param model The model into which to merge the values specified by its plugin management section, must not be
     *            <code>null</code>.
     * @param request The model building request that holds further settings, must not be {@code null}.
     * @param problems The container used to collect problems that were encountered, must not be {@code null}.
     */