Rows in any grid can be dragged and dropped to other grids and vice versa.
This is done by:
dropModel.acceptplay crucial role in creating draggable / droppable relation between grids.
dropModel.dropmethod is most important part that does the actual manipulation of dragged row objects.
First of all mutiple row selection is turned on or checkbox selection is turned on.
dragModel.dragNodes method is implemented to return array of selected or checked rows.