def has_extn(self, argv):
        if self._client.has_extn(argv[1]):
            self._print("client has extension.")
        else:
            self._print("client does NOT have extension.")
Given a tenant, search for the Quantum network and port
dataset/ETHPy150Open kdart/pycopia/net/pycopia/smtpCLI.py/EmailClientCLI.has_extn--crossover with--dataset/ETHPy150Open nii-cloud/dodai-compute/nova/network/quantum/quantum_connection.py/QuantumClientConnection.get_port_by_attachment