createDragIcon  
  ⚠️ Deprecated ⚠️
This is deprecated since version 4.10.
Use class@Gtk.GridView instead
---Creates a GdkPaintable representation of the item at @path. This image is used for a drag icon.
Return
a newly-allocated GdkPaintable of the drag icon.
Parameters
path
a GtkTreePath in @icon_view