private void setMsgTransactionId() {
    if (participateInTransaction() && getMessage().getTransactionId() == TXManagerImpl.NOTX) {
      getMessage().setTransactionId(TXManagerImpl.getCurrentTXUniqueId());
    }
  }
Sets the transaction id on the message
geode-core/src/main/java/org/apache/geode/cache/client/internal/AbstractOp.java