def RemoveClass(self, class_name):
    if class_name not in self._class_mapping:
      raise problems.NonexistentMapping(class_name)
    del self._class_mapping[class_name]
|PackURI| instance holding partname of this part, e.g.
dataset/ETHPy150Open google/transitfeed/transitfeed/gtfsfactory.py/GtfsFactory.RemoveClass--crossover with--dataset/ETHPy150Open scanny/python-pptx/pptx/opc/package.py/Part.partname