@Override
  public void toData(DataOutput out,
      SerializationContext context) throws IOException {
    super.toData(out, context);
    out.writeInt(processorId);
    out.writeInt(txUniqId);
    DataSerializer.writeObject(txMemberId, out);
  }
Transaction operations override this method to do actual work

@param txId The transaction Id to operate on
@return true if TXMessage should send a reply false otherwise
geode-core/src/main/java/org/apache/geode/internal/cache/TXMessage.java