{
  "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."
    }
  }
}