def get_ring(self):
        raise DomainError('there is no ring associated with %s' % self)
Test to return disk usage counters used by the vms
dataset/ETHPy150Open sympy/sympy/sympy/polys/domains/field.py/Field.get_ring--crossover with--dataset/ETHPy150Open saltstack/salt/tests/unit/modules/xapi_test.py/XapiTestCase.test_vm_diskstats