@property
    def valid(self):
        if self._valid is None:
            self.function
        return self._valid
Valid delivery reports should create reports in the DB.
dataset/ETHPy150Open tethysplatform/tethys/tethys_apps/base/persistent_store.py/TethysFunctionExtractor.valid--crossover with--dataset/ETHPy150Open rapidsms/rapidsms/rapidsms/backends/kannel/tests.py/KannelDeliveryReportTest.test_valid_post