cinder/cinder/tests/functional/api_sample_tests/samples/volume-type-default-response.json.tpl

{
    "volume_type": {
        "description": "volume type 0001",
        "extra_specs": {
            "capabilities": "gpu"
        },
        "id": "%(uuid)s",
        "is_public": true,
        "name": "vol-type-001",
        "qos_specs_id": null
    }
}