json_schema: {
      "title": "Tree",
      "$schema": "http://json-schema.org/draft-04/schema#",
      "type": "object",
      "properties": {
          "autoIncRowNum": {
              "type": "integer"
          },
          "maxSiblings": {
              "type": "integer",
              "minimum": 1
          }
      },
      "required": [
          "autoIncRowNum",
          "maxSiblings"
      ]
  }