@classmethod
    def from_spec(cls, spec, validator_map, resource_roots):
        pass
Starts connection. Used interally. Returns non-empty string on success.
dataset/ETHPy150Open openstack/sahara/sahara/plugins/images.py/SaharaImageValidatorBase.from_spec--crossover with--dataset/ETHPy150Open kuri65536/python-for-android/python-build/python-libs/xmpppy/xmpp/transports.py/HTTPPROXYsocket.plugin