The only point of adding a library to this entire system is to find a balance between something that is pretty ergonomic and also pretty safe. You'll never have the fullness of ergonomics and safety at the same time. So you're trying to find somewhere in between those two. And so we've got our own library. There's probably a dozen or more other libraries in the iOS community. But basically there's a plethora of library. That's what I mean. It gives the ergonomics, but it takes away the safety because then it's on you to remember to pass alongBecause the compiler can't help you if you don't pass it. If you get a default