def addRevertEvent(self, event):
        if not callable(event):
            raise ValueError("Events must be callable", event)
        self._revertEvents.append(event)
Bind a method to a key at runtime to be invoked when the key is initially
dataset/ETHPy150Open twisted/imaginary/imaginary/events.py/TransactionalEventBroadcaster.addRevertEvent--crossover with--dataset/ETHPy150Open caseman/grease/grease/controls.py/KeyControls.bind_key_press