@Override
  public VersionTag getVersionTag(Object key) {
    Region.Entry entry = getEntry(key, true);
    VersionTag tag = null;
    if (entry instanceof EntrySnapshot) {
      tag = ((EntrySnapshot) entry).getVersionTag();
    } else if (entry instanceof NonTXEntry) {
      tag = ((NonTXEntry) entry).getRegionEntry().getVersionStamp().asVersionTag();
    }
    return tag;
  }
Test hook - returns the version stamp for an entry in the form of a version tag

@return the entry version information
geode-core/src/main/java/org/apache/geode/internal/cache/LocalRegion.java