def IsCanceled(self):
    raise NotImplementedError
apply_pressed() -> None
dataset/ETHPy150Open AppScale/appscale/AppServer/google/net/proto2/python/public/service.py/RpcController.IsCanceled--crossover with--dataset/ETHPy150Open VisTrails/VisTrails/vistrails/gui/version_prop.py/QNotesDialog.apply_pressed