correlationID = readString(in);
   public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException   {      super.readExternal(in);      destination = (Destination) in.readObject();      replyToDestination = (Destination) in.readObject();      jmsType = readString(in);      propertiesWritable = in.readBoolean();      properties = readMap(in);            isCorrelationIDBytes = in.readBoolean();      if (isCorrelationIDBytes)      {         int length = in.readInt();         if (length == -1)         {            correlationIDBytes = null;         }         else         {            correlationIDBytes = new byte[length];            in.readFully(correlationIDBytes);         }      }      else      {         correlationID = readString(in);      }      connectionID = readString(in);   }