@Override
  public boolean isKeyEqual(final Object key) {
    if (key instanceof UUID) {
      UUID uuid = (UUID) key;
      return uuid.getLeastSignificantBits() == keyLeastSigBits
          && uuid.getMostSignificantBits() == keyMostSigBits;
    }
    return false;
  }
get rvv internal low bytes. Used by region entries for transferring to storage
geode-core/src/main/java/org/apache/geode/internal/cache/entries/VersionedThinDiskRegionEntryHeapUUIDKey.java