Function traverse_unresolved_paint 

fn traverse_unresolved_paint<'a, P: ColorPainter>(
    paint: &Paint<'a>,
    state: &mut TraversalState<'a, P>,
    decycler: &mut Decycler<usize, MAX_TRAVERSAL_DEPTH>,
    recurse_depth: usize,
) -> Result<(), PaintError>