def execute(self, ns, name, devices, _extent_size=None):
        if _extent_size:
            _extent_size = str2size(_extent_size)
        lvm.create_vg(ns, devices, name, _extent_size)
This test case checks upload volume to image functionality:
dataset/ETHPy150Open openlmi/openlmi-scripts/commands/storage/lmi/scripts/storage/cmd/vg.py/VGCreate.execute--crossover with--dataset/ETHPy150Open openstack/horizon/openstack_dashboard/test/integration_tests/tests/test_volumes.py/TestVolumesActions.test_volume_upload_to_image