Look into generate multiple interfaces with ksp.

[johngray1965]

We have the basic interface, plus a suspend interface, and a suspend+arrow interface. The suspend and arrow interfaces are remarkable similar. The signatures are different, and the guts are just a touch different.

They desperately want some kind of code generator. ksp, swagger, mustache, something...

Once we have some way to generate the various wrappers, no reasons not to generate others (Rx for instance).