def shutdown(self, event):
        _LOGGER.debug('Event processing signaled exit')
        self._queue.put(self._quit_object)
Evaluate a function on the range extremes.
dataset/ETHPy150Open home-assistant/home-assistant/homeassistant/components/graphite.py/GraphiteFeeder.shutdown--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/datastore/appscale_stub_util.py/ValueRange.MapExtremes