@cached_property
    def if_modified_since(self):
        return parse_date(self.environ.get('HTTP_IF_MODIFIED_SINCE'))
Called once a transfer has finished.
dataset/ETHPy150Open Eforcers/gae-flask-todo/lib/werkzeug/wrappers.py/ETagRequestMixin.if_modified_since--crossover with--dataset/ETHPy150Open ganeti/ganeti/lib/masterd/instance.py/ExportInstanceHelper._TransferFinished