RowGroupData
Grouping data interface returned by datasource when it returns row group information. This data will be converted to 
Properties
| Name | Type | Description | 
|---|---|---|
| count | number | undefined | |
| value | string | 
Grouping data interface returned by datasource when it returns row group information. This data will be converted to 
| Name | Type | Description | 
|---|---|---|
| count | number | undefined | |
| value | string |