SimpleModelProblemCollector problems = new SimpleModelProblemCollector(result);

        modelValidator.validateEffectiveModel(model, request, problems);

        return result;
    }

    private static class SimpleModelProblemCollector implements ModelProblemCollector {

        ModelValidationResult result;

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