{
    "DemStitcher": {
        "args": {
            "type": {
                "value": [
                    "version2",
                    "version3"
                ],
                "type": "str",
                "optional": true,
                "default": "version3"
            }
        },
        "factory": "createDemStitcher",
        "package": "contrib.demUtils"
    }
}