Is there a way of looking at desugared code? Maybe things won't change that much, but I feel that documentation on how desugaring is supposed to be done will be

Is there a way of looking at desugared code? Maybe things won't change that much, but I feel that documentation on how desugaring is supposed to be done will be increasingly wrong as things change. Maybe it's stable enough, but It'd be cool to have a nice way of verifying things are happening the way they are supposed to.