pairGenericIso :: SexpG a -> SexpG b -> SexpG (Pair a b)
pairGenericIso a b = with (\pair -> pair . list (el a >>> el b))
pairGenericIso :: SexpG a -> SexpG b -> SexpG (Pair a b)
pairGenericIso a b = with (\pair -> pair . list (el a >>> el b))
pairGenericIso a b = with (\pair -> pair . list (el a >>> el b))