}

    static String getGroupId(Model model) {
        String groupId = model.getGroupId();
        if (groupId == null && model.getParent() != null) {
            groupId = model.getParent().getGroupId();
        }
        return groupId;
    }

    private String getVersion(Model model) {
        String version = model.getVersion();
        if (version == null && model.getParent() != null) {

        }
    }

    @Override
    public Model injectDefaultValues(Model model, ModelBuilderRequest request, ModelProblemCollector problems) {
        Model.Builder builder = Model.newBuilder(model);

        builder.dependencies(injectList(model.getDependencies(), this::injectDependency));
        Build build = model.getBuild();
        if (build != null) {

import java.util.Map;

import org.apache.maven.api.Language;
import org.apache.maven.api.model.DependencyManagement;
import org.apache.maven.api.model.DistributionManagement;
import org.apache.maven.api.model.License;
import org.apache.maven.api.model.Model;
import org.apache.maven.api.model.Prerequisites;
import org.apache.maven.api.model.Repository;
import org.apache.maven.api.services.RepositoryFactory;

    @Test
    void testMergeModel_ModelVersion() {
        Model parent = Model.newBuilder().modelVersion("4.0.0").build();
        Model model = Model.newInstance();
        Model.Builder builder = Model.newBuilder(model);
        modelMerger.mergeModel_ModelVersion(builder, model, parent, false, null);
        assertNull(builder.build().getModelVersion());

        model = Model.newBuilder().modelVersion("5.0.0").build();

     */
    @Deprecated
    Model interpolate(Model project, Map<String, ?> context) throws ModelInterpolationException;

    /**
     * @deprecated Use {@link ModelInterpolator#interpolate(Model, File, ProjectBuilderConfiguration, boolean)} instead.
     */
    @Deprecated

     *
     * @return The assembled model, never {@code null}.
     */
    @Nonnull
    Model getEffectiveModel();

    /**
     * Gets the specified raw model as it was read from a model source. Apart from basic validation, a raw model has not
     * undergone any updates by the model builder, e.g. reflects neither inheritance nor interpolation. The model

     *
     * @param model The model whose URLs should be normalized, may be {@code null}.
     * @param request The model building request that holds further settings, must not be {@code null}.
     */
    Model normalize(Model model, ModelBuilderRequest request);

                .computeIfAbsent(profiles, l -> doInjectProfiles(model, profiles));
        return result == KEY ? model : result;
    }

    private Model doInjectProfiles(Model model, List<Profile> profiles) {
        Model orgModel = model;
        for (Profile profile : profiles) {
            if (profile != null) {

    @Deprecated
    public Model interpolate(Model model, Map<String, ?> context, boolean strict) throws ModelInterpolationException {
        Properties props = new Properties();
        props.putAll(context);

        return interpolate(model, null, new DefaultProjectBuilderConfiguration().setExecutionProperties(props), true);
    }

    public Model interpolate(Model model, File projectDir, ProjectBuilderConfiguration config, boolean debugEnabled)

     */
    default Model injectProfile(
            Model model, Profile profile, ModelBuilderRequest request, ModelProblemCollector problems) {
        return injectProfiles(model, List.of(profile), request, problems);
    }

    /**
     * Merges values from the specified profile into the given model. Implementations are expected to keep the profile