@wsgi.response(202)
    @wsgi.action('addFixedIp')
    @extensions.expected_errors((400, 404))
    @validation.schema(multinic.add_fixed_ip)
    def _add_fixed_ip(self, req, id, body):
        context = req.environ['nova.context']
        authorize(context)

        instance = common.get_instance(self.compute_api, context, id)
        network_id = body['addFixedIp']['networkId']
        try:
            self.compute_api.add_fixed_ip(context, instance, network_id)
        except exception.InstanceUnknownCell as e:
            raise exc.HTTPNotFound(explanation=e.format_message())
        except exception.NoMoreFixedIps as e:
            raise exc.HTTPBadRequest(explanation=e.format_message())
Make a HEAD request for an object in S3.  This is needed to find the
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/api/openstack/compute/multinic.py/MultinicController._add_fixed_ip--crossover with--dataset/ETHPy150Open devstructure/blueprint/blueprint/io/server/backend.py/head