* @param problems The container used to collect problems that were encountered, must not be {@code null}.
     */
    Model mergeDuplicates(Model model, ModelBuilderRequest request, ModelProblemCollector problems);

    /**
     * Sets default values in the specified model that for technical reasons cannot be set directly in the Modello
     * definition.

 *
 */
@Named
@Singleton
public class DefaultModelNormalizer implements ModelNormalizer {

    private DuplicateMerger merger = new DuplicateMerger();

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

        Build build = model.getBuild();
        if (build != null) {

                profileSelector.getActiveProfiles(inputModel.getProfiles(), profileActivationContext, problems);

        // model normalization
        problems.setSource(inputModel);
        inputModel = modelNormalizer.mergeDuplicates(inputModel, request, problems);

        Map<String, Activation> interpolatedActivations = getProfileActivations(inputModel);
        inputModel = injectProfileActivations(inputModel, interpolatedActivations);