It is a very similar process to convert an old Observable to Flowable:

toV2Flowable(rx.Observable.just("One", "Two", "Three"))
 .doOnNext(i -> log("doOnNext", i))
 .subscribe(i -> log("subscribe", i));

It's pretty much identical to what we have seen with toV2Observable.

The other conversations follow the same pattern, so using them is very straightforward.