json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "id": "http://luciozambon.altervista.org/egiga2m/schemas/tree_key.json",
      "type": "array",
      "items": {
          "type": "object",
          "properties": {
              "title": {
                  "type": "string"
              },
              "key": {
                  "type": "string"
              },
              "lazy": {
                  "type": "boolean"
              },
              "folder": {
                  "type": "boolean"
              },
              "isArray": {
                  "type": "boolean"
              },
              "icon": {
                  "type": "string"
              },
              "tooltip": {
                  "type": "string"
              }
          },
          "required": [
              "title",
              "key",
              "lazy",
              "folder"
          ],
          "additionalProperties": false
      }
  }