def off(self):
        self.send('L1:' + self.number + ',00')
        self.last_time_changed = time.time()
Check if the backend allows registration
dataset/ETHPy150Open missionpinball/mpf/mpf/platform/fast.py/FASTMatrixLight.off--crossover with--dataset/ETHPy150Open mathcamp/pypicloud/pypicloud/access/base.py/IAccessBackend.allow_register