Issue while creating new custom visual

I am creating new custom visual with below reference link. 

Link : https://blogs.msdn.microsoft.com/tsmatsuz/2016/09/27/power-bi-custom-visuals-programming/

I am getting error while following his steps while updating kind propery in below code snipet.

Error : "instance.dataRoles[0].kind is not one of enum values : Grouping, Measure, GroupingOrMeasure."

Code Snipper :

 "dataRoles": [
    {
      "displayName": "Summarize Category",
      "name": "myCategory",
      "kind": 0
    },
    {
      "displayName": "Measure Data",
      "name": "myMeasure",
      "kind": 1
    }
  ],

Please do me helpful.