List<ModelProblem> getProblems();

    boolean hasErrors();

    boolean hasFatalErrors();

    default void add(BuilderProblem.Severity severity, ModelProblem.Version version, String message) {
        add(severity, version, message, null, null);
    }

    default void add(
            BuilderProblem.Severity severity, ModelProblem.Version version, String message, InputLocation location) {

    }

    @Override
    public void validate(Settings settings, boolean isProjectSettings, SettingsProblemCollector problems) {
        List<BuilderProblem> list = settingsBuilder.validate(settings.getDelegate(), isProjectSettings);
        for (BuilderProblem problem : list) {
            addViolation(problems, Severity.valueOf(problem.getSeverity().name()), problem.getMessage());
        }
    }

    private final List<BuilderProblem> problems;

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

    public SettingsBuilderException(String message, List<BuilderProblem> 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) {

import java.nio.file.Path;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;

import org.apache.maven.api.Session;
import org.apache.maven.api.services.BuilderProblem;
import org.apache.maven.api.services.Source;
import org.apache.maven.api.services.ToolchainsBuilderException;
import org.apache.maven.api.services.ToolchainsBuilderRequest;

                @Nonnull
                @Override
                public Collection<BuilderProblem> getProblems() {
                    return new MappedCollection<>(res.getProblems(), this::toProblem);
                }

                private BuilderProblem toProblem(ModelProblem problem) {
                    return new BuilderProblem() {
                        @Override
                        public String getSource() {

            };
        } else {
            return null;
        }
    }

    private List<SettingsProblem> convert(List<BuilderProblem> problems) {
        return problems.stream().map(this::convert).toList();
    }

    private SettingsProblem convert(BuilderProblem problem) {
        return new DefaultSettingsProblem(
                problem.getMessage(),

     *
     * @param settings The settings to validate, must not be {@code null}.
     * @return The list of problems that were encountered, must not be {@code null}.
     */
    @Nonnull
    default List<BuilderProblem> validate(@Nonnull Settings settings) {
        return validate(settings, false);
    }

    /**
     * Validate the specified settings.
     *

     *
     * @return the problems that were encountered during the project building, can be empty but never {@code null}
     */
    @Nonnull
    Collection<BuilderProblem> getProblems();

    /**
     * Gets the result of the dependency resolution for the project.
     *
     * @return the result of the dependency resolution for the project
     */
    @Nonnull

 * or a simple string message. In addition, a problem carries a hint about its source, e.g. the POM file that exhibits
 * the problem.
 *
 */
public interface ModelProblem extends BuilderProblem {

    /**
     * Version
     */
    enum Version {
        // based on ModeBuildingResult.validationLevel
        BASE,
        V20,
        V30,
        V31,
        V40,
        V41