While completely unrelated to the new fuzz feature, one library I'd love to see added to the standard library is one for more standard units besides time, such

While completely unrelated to the new fuzz feature, one library I'd love to see added to the standard library is one for more standard units besides time, such as a distance library. It would be awesome to be able to do something like `foo := 100 * distance.Meters` which returns a distance.Distance type. At the company I work at we do a lot of stuff with distances and time and with the time library it's a lot easy to have strong time typing throughout the codebase, but without a standard distance library, I've seen things in meters, kilometers, miles, etc. With every new version they can introduce new unit libraries until there are ones for velocity, acceleration, area, volume, mass, temperature, etc. This would make golang a great option for many business uses and scientific uses. The other thing golang should standardize in it's stdlib that is testing related is a clock libary like facebookgo/clock library for time control. It's already standard practice to have the rand library be injected with a seed so you can have determinism for tests. The same is need for controlling time for many use cases if you want determinism in tests involving time. Making this part of the stdlib and making it best practice to always dependency inject a clock instead of using a global like time.Now() would go a long way to improving more complex unit/integration testing where time is involved. https://pkg.go.dev/github.com/facebookgo/clock https://pkg.go.dev/github.com/facebookgo/clock