GroupableSettings

Sets options for the Grid's grouping feature.

Name	Type	Default	Description
emptyText?	string		Represents the text shown when the grouping area is empty. The default is Drag a column header and drop it here to group by that column.
enabled?	boolean		If true, lets users group by dragging and dropping column headers. If set to true, users can group the Grid by dragging column headers. Grouping is off by default.
showFooter	boolean		When true, shows the group footer template when the group is collapsed.