Converts @sorted_path to a path on the child model of @tree_model_sort.
That is, @sorted_path points to a location in @tree_model_sort. The
returned path will point to the same location in the model not being
sorted. If @sorted_path does not point to a location in the child model,
%NULL is returned.
Converts @sorted_path to a path on the child model of @tree_model_sort. That is, @sorted_path points to a location in @tree_model_sort. The returned path will point to the same location in the model not being sorted. If @sorted_path does not point to a location in the child model, %NULL is returned.