"VisualizableError",
"visualizableError",
  public EventSetDescriptor [] getEventSetDescriptors() {    try {      EventSetDescriptor [] esds = { 	new EventSetDescriptor(ClassifierPerformanceEvaluator.class, 			       "text", 			       TextListener.class, 			       "acceptText"),	new EventSetDescriptor(ClassifierPerformanceEvaluator.class, 			       "ThresholdData", 			       ThresholdDataListener.class, 			       "acceptDataSet"),      	new EventSetDescriptor(ClassifierPerformanceEvaluator.class, 			       "VisualizableError", 			       VisualizableErrorListener.class, 			       "acceptDataSet")};      return esds;    } catch (Exception ex) {      ex.printStackTrace();    }    return null;  }