def removeFiducialObservers(self):
    for obj,tag in self.observerTags:
      obj.RemoveObserver(tag)
    self.observerTags = []
Remove any existing observers
dataset/ETHPy150Open acil-bwh/SlicerCIP/Scripted/InteractiveLobeSegmentation/InteractiveLobeSegmentation.py/ILSVisualizationWidget.removeFiducialObservers