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