Asks the #GtkTreeDragSource to return a #GdkContentProvider representing the row at @path. Should robustly handle a @path no longer found in the model!
row that was dragged
a #GdkContentProvider for the given @path or %NULL if none exists
See Implementation
Asks the #GtkTreeDragSource to return a #GdkContentProvider representing the row at @path. Should robustly handle a @path no longer found in the model!