def _exists(self):
        try:
            check_output([b"zfs", b"list", self.name], stderr=STDOUT)
        except CalledProcessError:
            return False
        return True
Create a new security group
dataset/ETHPy150Open ClusterHQ/flocker/flocker/volume/filesystems/zfs.py/Filesystem._exists--crossover with--dataset/ETHPy150Open haxsaw/actuator/src/actuator/provisioners/openstack/resources.py/SecGroup.__init__