def evaluate(self, _tuple, scheme, state=None):
        raise NotImplementedError()
Send a notification because all facilities are stocked out of a product.
dataset/ETHPy150Open uwescience/raco/raco/expression/aggregate.py/LocalAggregateOutput.evaluate--crossover with--dataset/ETHPy150Open dimagi/commcare-hq/custom/ewsghana/tests/test_notifications.py/UrgentStockoutNotificationTestCase.test_all_facility_stockout