json_schema: {
      "title": "labelExpressionInfo",
      "type": "object",
      "$schema": "http://json-schema.org/draft-04/schema",
      "description": "The labelExpressionInfo allows label text to be read similar to that of Popups's description property.",
      "properties": {
          "expression": {
              "type": "string",
              "description": "An [Arcade expression](https://developers.arcgis.com/arcade/) evaluating to either a string or a number."
          }
      },
      "additionalProperties": false,
      "esriDocumentation": {
          "examples": [
              {
                  "title": "labelExpressionInfo",
                  "code": {
                      "labelExpressionInfo": {
                          "expression": "return $feature[\"state_name\"] + \" (arcade)\";"
                      }
                  }
              }
          ]
      }
  }