I assume you meant `.ok_or`, not `.expect`. Either way, I'm not really how this or your `.ok_or_else` comment is relevant to this sub-thread. `.map` is not a me

I assume you meant `.ok_or`, not `.expect`. Either way, I'm not really how this or your `.ok_or_else` comment is relevant to this sub-thread. `.map` is not a method on tuples.