{
    "title": "Visual Variable Legend Options",
    "type": "object",
    "$schema": "http://json-schema.org/draft-04/schema",
    "description": "Options available for the legend for visual variables.",
    "properties": {
        "customValues": {
            "type": "array",
            "items": {
                "type": "number"
            }
        },
        "showLegend": {
            "type": "boolean",
            "description": "Indicates whether to show the color/size/opacity ramp in the legend."
        },
        "title": {
            "type": "string",
            "description": "The title of the legend."
        }
    }
}