*
 */
public class SimpleProblemCollector implements ModelProblemCollector {
    private Model model;

    private List<String> warnings = new ArrayList<>();

    private List<String> errors = new ArrayList<>();

    private List<String> fatals = new ArrayList<>();

    public SimpleProblemCollector() {}

    public SimpleProblemCollector(Model model) {
        this.model = model;
    }

    }

    private SimpleProblemCollector validateRaw(String pom, int level) throws Exception {
        return validateRaw(pom, mbr -> mbr.setValidationLevel(level));
    }

    private SimpleProblemCollector validateRaw(String pom, UnaryOperator<ModelBuildingRequest> requestConfigurer)
            throws Exception {
        Model model = read(pom);

        SimpleProblemCollector problems = new SimpleProblemCollector(model);

        model.addProfile(prof);
        SimpleProblemCollector problems = new SimpleProblemCollector();
        validator.validate(model, problems);
        assertEquals(0, problems.messages.size());

        Repository repo = new Repository(org.apache.maven.api.settings.Repository.newInstance(false));
        prof.addRepository(repo);
        problems = new SimpleProblemCollector();
        validator.validate(model, problems);

        Model model = Model.newBuilder().scm(scm).build();

        ModelInterpolator interpolator = createInterpolator();

        final SimpleProblemCollector collector = new SimpleProblemCollector();
        Model out = interpolator.interpolateModel(model, new File("."), createModelBuildingRequest(context), collector);

        assertProblemFree(collector);

    }

    protected void assertActivation(boolean active, Profile profile, ProfileActivationContext context) {
        SimpleProblemCollector problems = new SimpleProblemCollector();

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

        });

        List<Profile> profiles = Collections.singletonList(newProfile("one"));
        DefaultProfileActivationContext context = new DefaultProfileActivationContext();
        SimpleProblemCollector problems = new SimpleProblemCollector();
        List<Profile> active = selector.getActiveProfiles(profiles, context, problems);
        assertTrue(active.isEmpty());
        assertEquals(1, problems.getErrors().size());

            parent = Model.newBuilder(parent, true).pomFile(null).build();
            child = Model.newBuilder(child, true).pomFile(null).build();
        }

        SimpleProblemCollector problems = new SimpleProblemCollector();

        Model assembled = assembler.assembleModelInheritance(child, parent, null, problems);

        // write baseName + "-actual"
        File actual = new File(

    }

    private void assertActivationWithProblems(
            Profile profile, ProfileActivationContext context, String warningContains) {
        SimpleProblemCollector problems = new SimpleProblemCollector();

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

        assertEquals(0, problems.getErrors().size());