return null;
                    }
                    try {
                        ModelBuildingRequest gaBuildingRequest =
                                new DefaultModelBuildingRequest(request).setModelSource(source);
                        return defaultModelBuilder.readRawModel(gaBuildingRequest, problems);
                    } catch (ModelBuildingException e) {
                        // gathered with problem collector

        ModelBuilder builder = new DefaultModelBuilderFactory().newInstance();
        assertNotNull(builder);

        DefaultModelBuildingRequest request = new DefaultModelBuildingRequest();
        request.setModelSource(new StringModelSource(BASE1));
        request.setModelResolver(new CycleInImportsResolver());

        assertThrows(ModelBuildingException.class, () -> builder.build(request));
    }

    }

    @Override
    public ModelSource getModelSource() {
        return request.getModelSource();
    }

    @Override
    public FilterModelBuildingRequest setModelSource(ModelSource modelSource) {
        request.setModelSource(modelSource);

        return this;
    }

    @Override
    public int getValidationLevel() {
        return request.getValidationLevel();
    }

    @Override

    /**
     * Sets the source of the POM to process. Eventually, either {@link #setModelSource(ModelSource)} or
     * {@link #setPomPath(Path)} must be set.
     *
     * @param modelSource The source of the POM to process, may be {@code null}.
     * @return This request, never {@code null}.
     */
    ModelBuildingRequest setModelSource(ModelSource modelSource);

    /**
     * Gets the POM file of the project to build.

     *
     * @param request The request to copy, must not be {@code null}.
     */
    public DefaultModelBuildingRequest(ModelBuildingRequest request) {
        setPomPath(request.getPomPath());
        setModelSource(request.getModelSource());
        setValidationLevel(request.getValidationLevel());
        setProcessPlugins(request.isProcessPlugins());
        setTwoPhaseBuilding(request.isTwoPhaseBuilding());

                if (resolveResult.getRepository() instanceof WorkspaceRepository) {
                    modelRequest.setPomPath(pomArtifact.getPath());
                } else {
                    modelRequest.setModelSource(new ArtifactModelSource(
                            pomArtifact.getPath(),
                            pomArtifact.getGroupId(),
                            pomArtifact.getArtifactId(),

        final ModelBuildingRequest request = new DefaultModelBuildingRequest()
                .setValidationLevel(validationLevel)
                .setLocationTracking(locationTracking)
                .setModelSource(new FileModelSource(pomFile));
        DefaultModelProblemCollector problems = new DefaultModelProblemCollector(new DefaultModelBuildingResult());
        try {
            Model model = readFileModel(request, problems);