We just merged support for generating values of types from the refined library through the zio-test-refined module thanks to work from @afsalthaj and @pierangeloc .

This ticket is to go through all refined types defined in the refined library and make sure that we have a corresponding generator for them. This ticket can potentially be worked on by multiple people, so a good first step wou

I think having Crank emit errors/warnings in more situations would go a long ways towards compensating for the docs' lack of nuance.

E.g., an async generator returning undefined doesn't strike me as a common thing to want to do, and if someone wants it maybe they should return null so it's explicit. Then Crank could throw an error if an async generator returns undefined. That should