def _extract_vaco(self):
        self._api_version, self._account, self._container, self._obj = \
            self._parse_vaco()
Deletes an existing extra spec.
dataset/ETHPy150Open openstack/storlets/Engine/swift/storlet_middleware/storlet_handler.py/BaseStorletHandler._extract_vaco--crossover with--dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/api/openstack/compute/legacy_v2/contrib/flavorextraspecs.py/FlavorExtraSpecsController.delete