* @param problems The container used to collect problems that were encountered, must not be {@code null}.
     */
    default Model injectProfile(
            Model model, Profile profile, ModelBuilderRequest request, ModelProblemCollector problems) {
        return injectProfiles(model, List.of(profile), request, problems);
    }

    /**

    private final List<BuilderProblem> problems;

    /**
     * @param message the message to give
     * @param e the {@link Exception}
     */
    public ToolchainsBuilderException(String message, Exception e) {
        super(message, e);
        this.problems = List.of();
    }

    public ToolchainsBuilderException(String message, List<BuilderProblem> problems) {

        List<? extends ValueSource> valueSources = createValueSources(model, projectDir, request, problems);
        List<? extends InterpolationPostProcessor> postProcessors = createPostProcessors(model, projectDir, request);

        InnerInterpolator innerInterpolator = createInterpolator(valueSources, postProcessors, request, problems);

     */
    ModelBuilderRequest request();

    /**
     * Gets the container used to collect problems that were encountered while processing the event.
     *
     * @return The container used to collect problems that were encountered, never {@code null}.
     */
    ModelProblemCollector problems();

	crawl(*root, "")

	wg.Wait()
	close(urlq)
	for uf, needers := range neededFrags {
		if !fragExists[uf] {
			problems = append(problems, fmt.Sprintf("Missing fragment for %+v from %v", uf, needers))
		}
	}

	for _, s := range problems {
		fmt.Println(s)
	}
	if len(problems) > 0 {
		os.Exit(1)
	}

    /**
     * Gets the problems that were encountered during the settings building. Note that only problems of severity
     * {@link BuilderProblem.Severity#WARNING} and below are reported here. Problems with a higher severity level cause
     * the settings builder to fail with a {@link ToolchainsBuilderException}.
     *

    Settings getEffectiveSettings();

    /**
     * Gets the problems that were encountered during the settings building. Note that only problems of severity
     * {@link BuilderProblem.Severity#WARNING} and below are reported here. Problems with a higher severity level cause
     * the settings builder to fail with a {@link SettingsBuilderException}.
     *

     *            {@code null}.
     * @param problems The container used to collect problems that were encountered, must not be {@code null}.
     * @return The profiles that have been activated, never {@code null}.
     */
    List<Profile> getActiveProfiles(
            Collection<Profile> profiles, ProfileActivationContext context, ModelProblemCollector problems);

     * @param problems The container used to collect problems that were encountered, must not be {@code null}.
     */
    Model importManagement(
            Model target,
            List<? extends DependencyManagement> sources,
            ModelBuilderRequest request,
            ModelProblemCollector problems);

import java.util.List;

/**
 * Collects problems that are encountered during settings building.
 *
 */
public interface ProblemCollector {

    /**
     * Adds the specified problem.
     * Either message or exception is required
     *
     * @param severity The severity of the problem, must not be {@code null}.
     * @param message The detail message of the problem, may be {@code null}.