void cleanup(InternalRegion r) {
    if (cleanedUp) {
      return;
    }
    cleanedUp = true;
    for (final TXEntryState es : entryMods.values()) {
      es.cleanup(r);
    }
    region.setInUseByTransaction(false);
  }
Put all the entries this region knows about into the given "entries" list as instances of
TXEntryStateWithRegionAndKey.
geode-core/src/main/java/org/apache/geode/internal/cache/TXRegionState.java