addRowGroup

adds a row group over the specified range

void addRowGroup(number|array rowId,string page);

rowId	number\|array	optional, a row ID or a range of row IDs: [start, end]
page	string	optional, a page name

$$("ssheet").addRowGroup();

Details

Increases nesting depth by one level, up to a maximum of 8.

If the rowId parameter isn't specified, the method adds a group for the selected row(s).

Grouping doesn't work with multiple active zones (multiselect).