def _check_vlan_transparency(self, context):
        if context.current.get('vlan_transparent'):
            for driver in self.ordered_mech_drivers:
                if not driver.obj.check_vlan_transparency(context):
                    raise vlantransparent.VlanTransparencyDriverError()
Helper method for checking vlan transparecncy support.
dataset/ETHPy150Open openstack/neutron/neutron/plugins/ml2/managers.py/MechanismManager._check_vlan_transparency