Model model, File projectDir, ModelBuildingRequest config, ModelProblemCollector problems) {
        return interpolateModel(model, projectDir != null ? projectDir.toPath() : null, config, problems);
    }

    @Override
    public Model interpolateModel(
            Model model, Path projectDir, ModelBuildingRequest config, ModelProblemCollector problems) {

            validateStringNotEmpty("artifactId", problems, Severity.FATAL, Version.V20, m.getArtifactId(), m);

            validateVersionNoExpression("version", problems, Severity.WARNING, Version.V20, m.getVersion(), m);
            if (parent == null) {
                validateStringNotEmpty("version", problems, Severity.FATAL, Version.V20, m.getVersion(), m);

        SimpleProblemCollector problems = new SimpleProblemCollector();

        assertEquals(active, activator.isActive(new org.apache.maven.model.Profile(profile), context, problems));

        assertEquals(0, problems.getErrors().size(), problems.getErrors().toString());
        assertEquals(0, problems.getWarnings().size(), problems.getWarnings().toString());
    }

     *            {@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);

    /**

    private final ModelProblemCollector problems;

    ProblemDetectingValueSource(
            ValueSource valueSource, String bannedPrefix, String newPrefix, ModelProblemCollector problems) {
        this.valueSource = valueSource;
        this.bannedPrefix = bannedPrefix;
        this.newPrefix = newPrefix;
        this.problems = problems;
    }

    @Override

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

    org.apache.maven.api.model.Model mergeDuplicates(
            org.apache.maven.api.model.Model model, ModelBuildingRequest request, ModelProblemCollector problems);

    }

    @Override
    public List<ModelProblem> getProblems() {
        return problems;
    }

    public DefaultModelBuildingResult setProblems(List<ModelProblem> problems) {
        if (problems != null) {
            this.problems = new ArrayList<>(problems);
        } else {
            this.problems.clear();
        }

        return this;
    }

     * @param problems The container used to collect problems that were encountered, must not be {@code null}.
     * @return The interpolated model, never {@code null}.
     * @since 4.0.0
     */
    Model interpolateModel(Model model, Path projectDir, ModelBuildingRequest request, ModelProblemCollector problems);

    /**
     * @since 4.0.0
     */

            final DefaultModelBuildingResult result,
            DefaultModelProblemCollector problems)
            throws ModelBuildingException {
        Model inputModel = readRawModel(request, problems);
        if (problems.hasFatalErrors()) {
            throw problems.newModelBuildingException();
        }

        problems.setRootModel(inputModel);

        this.securityDispatcher = securityDispatcher;
    }

    @Override
    public SettingsDecryptionResult decrypt(SettingsDecryptionRequest request) {
        List<SettingsProblem> problems = new ArrayList<>();

        List<Server> servers = new ArrayList<>();

        for (Server server : request.getServers()) {
            server = server.clone();

            String password = server.getPassword();