def _ReleaseKey(self):
    self._current_key.pop(-1)
Handle the close event from the proxy widget.
dataset/ETHPy150Open google/simian/src/simian/mac/munki/plist.py/ApplePlist._ReleaseKey--crossover with--dataset/ETHPy150Open ContinuumIO/ashiba/enaml/enaml/widgets/window.py/Window._handle_close