Version.V20,
                    "modelVersion",
                    null,
                    "of '" + string + "' is older than the versions supported by this version of Maven: "
                            + validVersions + ". Building this project requires an older version of Maven.",
                    tracker);

        } else {
            addViolation(
                    problems,

            // bv4: modelBuildingRequest.setBuildStartTime(request.getBuildStartTime());
            modelBuildingRequest.modelResolver(modelResolver);
            DefaultModelRepositoryHolder holder = new DefaultModelRepositoryHolder(
                    internalSession,
                    DefaultModelRepositoryHolder.RepositoryMerging.valueOf(
                            request.getRepositoryMerging().name()),