@Override
  public VersionTag generateVersionTag(VersionSource member, boolean withDelta,
      InternalRegion region, EntryEventImpl event) {
    throw new UnsupportedOperationException(); // no text needed - not a customer visible method
  }
update the value held in this non-local region entry
geode-core/src/main/java/org/apache/geode/internal/cache/NonLocalRegionEntry.java