@Override
  public Object getKeyForIterator(KeyInfo keyInfo, LocalRegion currRgn, boolean rememberReads,
      boolean allowTombstones) {
    Object key = keyInfo.getKey();
    if (key instanceof RegionEntry) {
      return ((RegionEntry) key).getKey();
    }
    return key;
  }
Get or create a TXRegionStub for the given region. For regions that are new to the tx, we
validate their eligibility.

@param region The region to involve in the tx.
@return existing or new stub for region
geode-core/src/main/java/org/apache/geode/internal/cache/TXStateStub.java