C＃GoogleSheets API将行插入第2行？

Question

如何在第2行插入空白行？

BatchUpdateSpreadsheetRequest requestBody = new 
          BatchUpdateSpreadsheetRequest();
          requestBody.Requests = new List<Request>();
          Request r = new Request();
          requestBody.Requests.Add(r);
          r.InsertDimension = new InsertDimensionRequest();

          var dr = new DimensionRange();
          dr.SheetId = 0;
          dr.Dimension="ROW";
          dr.StartIndex = 0;
          dr.EndIndex = 3;

         r.InsertDimension.Range = dr;
         r.InsertDimension.InheritFromBefore = false;

        SpreadsheetsResource.BatchUpdateRequest bur = 
        service.Spreadsheets.BatchUpdate(requestBody, spreadsheetId);
        bur.Execute();

此代码添加了2张空白行，如表

中所指定

我正在引用页面https://developers.google.com/sheets/api/samples/rowcolumn