EntryEventImpl getLastTransactionEvent(List<EntryEventImpl> callbacks) {
    return TXLastEventInTransactionUtils.getLastTransactionEventInGroupedTxForWANSender(callbacks,
        dm.getCache());
  }
Adds an entry op for this tx to do on the far side
geode-core/src/main/java/org/apache/geode/internal/cache/TXCommitMessage.java