might make sense to create a wrapping class that encapsulates the error / sucess

@Paul Woitaschek I use this approach for my coroutine wrapper for Retrofit: https://github.com/gildor/kotlin-coroutines-retrofit#awaitresult

.await

returns sealed class Result

gildor: It might make sense to change all your

T

T : Any

I think

T : Any

make sense for RxJava2, where you cannot use

null

as result, but for Retrofit you can easily write an adaptor that returns something in one case and null in another, actually even

json

allow you to use null as top level answer. So <T : Any> can broke some use cases