The way of displaying grid in which has done row grouping.
| BANDED | "banded" | The default display mode.
Display group header or footer in the same way as general data row.
Each row is displayed by being indented for group level. |
| BOXED | "boxed" | Display each row group in box.
Each row is displayed by being indented for group level.
(Do not support currently.) |
| MERGED | "merged" | Display by merging cells of the column which has been done grouping. Rows are not being indented. |