anchor.diff:      final delay = new Duration(seconds: 2);
   
       WpsRequestStatus(int this.id) : code = OgcStatus_55.STATUS_NOTYETSUBMITTED {
  -        _hub.events.WpsRequestUpdate.fire(new WpsRequestUpdateData(1));
  +        _incrementCounter();
   
           new Timer(delay, _poll);
       }
  
positive.code: 
              if (OgcStatus_55.isComplete(code)) {
                  log("done!");
                  _hub.events.WpsRequestUpdate.fire(new WpsRequestUpdateData(-1));
                  return;
              }
  
  
negative.code:             if (ogcDoc.isException) {
                  code = OgcStatus_55.STATUS_SYSTEMFAILURE;
                  exceptionTexts = ogcDoc.exceptionTexts;
                  _decrementCounter();
                  return;
              }
  
              if (ogcDoc is! OgcExecuteResponseDocument_54) {
                  code = OgcStatus_55.STATUS_SYSTEMFAILURE;
                  exceptionTexts = ["polled response neither exception report not response document"];
                  _decrementCounter();
                  return;
              }
  
  