ModelValidationResult result;

        SimpleModelProblemCollector(ModelValidationResult result) {
            this.result = result;
        }

        public void add(ModelProblemCollectorRequest req) {
            if (!ModelProblem.Severity.WARNING.equals(req.getSeverity())) {
                result.addMessage(req.getMessage());
            }
        }
    }

            Set<String> modules = new HashSet<>();
            for (int i = 0, n = m.getModules().size(); i < n; i++) {
                String module = m.getModules().get(i);
                if (!modules.add(module)) {
                    addViolation(
                            problems,
                            Severity.ERROR,
                            Version.V20,