def set_object_metadata(self, container, obj, metadata, clear=False,
            extra_info=None, prefix=None):
        return self._manager.set_object_metadata(container, obj, metadata,
                clear=clear, prefix=prefix)
L{MXCalculator.getMX} returns the MX record with the lowest preference
dataset/ETHPy150Open rackspace/pyrax/pyrax/object_storage.py/StorageClient.set_object_metadata--crossover with--dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/mail/test/test_mail.py/MXTestCase.test_badExchangeExcluded