> the idiomatic course of action would be to use a newtype to wrap a Vec<u8> But isn't that wrong already? The element type `u8` is not an ASCII char. We need

> the idiomatic course of action would be to use a newtype to wrap a Vec<u8> But isn't that wrong already? The element type `u8` is not an ASCII char. We need a subtype of `u8`, like `u7` if that existed.