if (exception != null) pam.setReceptionException (exception);
if (exception != null) { pam.setReceptionException (exception); pam.setReceptionNode (nodeID); }
    private byte[] createAck (AttributedMessage msg, long receiveTime, Exception exception) throws Exception    {      PureAckMessage pam = PureAckMessage.createInbandPureAckMessage (msg);      if (exception != null) pam.setReceptionException (exception);      pam.setInbandNodeTime ((int)(now()-receiveTime));      byte ackBytes[] = MessageSerializationUtils.writeMessageToByteArray (pam, getDigest());      return ackBytes;    }