private String getRecoveredGFVersionName() {
    String currentVersionStr = "GFE pre-7.0";
    KnownVersion version = getRecoveredGFVersion();
    if (version != null) {
      currentVersionStr = version.toString();
    }
    return currentVersionStr;
  }
Extension of the oplog lock file *
geode-core/src/main/java/org/apache/geode/internal/cache/DiskStoreImpl.java