def get_message(self, key):
        raise NotImplementedError('Method must be implemented by subclass')
>>> driver = DummyDNSDriver('key', 'secret')
dataset/ETHPy150Open babble/babble/include/jython/Lib/mailbox.py/Mailbox.get_message--crossover with--dataset/ETHPy150Open apache/libcloud/libcloud/dns/drivers/dummy.py/DummyDNSDriver.list_zones