Advanced User Interface Controls and Components
Gets the collection of groups that are assigned to the Grid.
An Array Object which contains all groups assigned to the Grid directive.
By using thsi property you can set groups from code. Each group is actually a column object, by which data is arranged. The position of the group reflects the grouping level.
Supported in: v3.2.
An example on multi level data grouping against one or more columns during run time in AngularJS Grid directive. Changing the group order, will reorganize the grid data.