rovv_derive

parse row! and dyn_row!, and transform them to

• impl LensRef<Optic![a], Image = A> + LensMut<Optic![b], Image = B> + Lens<Optic![c], Image = C> + 'a
• dyn LensRef<Optic![a], Image = A> + LensMut<Optic![b], Image = B> + Lens<Optic![c], Image = C> + 'a