Converts child_path
to a path relative to this.
That is, child_path
points to a path in the child model. The returned path will point to the same row in the sorted model.
If child_path
isn’t a valid path on the child model, then null is returned.
this |
A `GtkTreeModelSort` |
child_path |
A `GtkTreePath` to convert |
A newly allocated `GtkTreePath` |