}

    @Override
    CacheVersion getArtifactCacheLayoutVersion() {
        if (isSameOrNewer("1.9-rc-2")) {
            return CacheLayout.META_DATA.getVersionMapping().getVersionUsedBy(this.version).get();
        } else if (isSameOrNewer("1.9-rc-1")) {
            return CacheVersion.parse("1.31");
        } else if (isSameOrNewer("1.7-rc-1")) {
            return CacheVersion.parse("0.26");