def invalidate(self, dest):
        self.valid = False
        self.response = dest
Subclasses should call this method whenever change events occur.
dataset/ETHPy150Open dokterbob/satchmo/satchmo/apps/payment/views/confirm.py/ConfirmController.invalidate--crossover with--dataset/ETHPy150Open goFrendiAsgard/kokoropy/kokoropy/packages/sqlalchemy/ext/mutable.py/Mutable.changed