GridGroupableSettings

The settings for grouping the data of the Grid (see example).

Name	Type	Default	Description
enabled?	boolean		Determines if grouping by dragging and dropping the column headers is allowed and if the group header is visible.
expandable?	boolean | GridGroupExpandableSettings		The group expandable settings.
footer?	"none" | "visible" | "always"		Determines if the group footer row is visible when the group is collapsed. Defaults to none.