problems.add(Severity.FATAL, ModelProblem.Version.BASE, buffer.toString(), parent.getLocation(""), e);
            throw problems.newModelBuilderException();
        }

        int validationLevel = Math.min(request.getValidationLevel(), ModelBuilderRequest.VALIDATION_LEVEL_MAVEN_2_0);
        ModelBuilderRequest lenientRequest = ModelBuilderRequest.builder(request)
                .validationLevel(validationLevel)

                if (str != null) {
                    parallelism = Integer.parseInt(str);
                }
            } catch (Exception e) {
                // ignore
            }
            return Math.max(1, Math.min(parallelism, Runtime.getRuntime().availableProcessors()));
        }

        ProjectBuildingResult build(Path pomFile, ModelSource modelSource) throws ProjectBuildingException {

        // we use a dedicated comparator because we control our model version scheme.
        String[] firstSegments = first.split("\\.");
        String[] secondSegments = second.split("\\.");
        for (int i = 0; i < Math.max(firstSegments.length, secondSegments.length); i++) {
            int result = Long.valueOf(i < firstSegments.length ? firstSegments[i] : "0")