{
    "additionalProperties": false,
    "definitions": {
        "features": {
            "type": "array",
            "items": { "type": "string" },
            "uniqueItems": true
        }
    },
    "properties": {
        "enable": { "$ref": "#/definitions/features" },
        "ignore": { "$ref": "#/definitions/features" }
    },
    "type": ["object", "null"]
}