Filters and Flowables page is possibly incorrect

[paulvi]

On Filters and Flowables page http://docs.web3j.io/4.8.7/getting_started/pub_sub/
There is code with Subscription

Subscription subscription = web3j.blockFlowable(false).subscribe(block -> {

1. but it is not clear what exact class is too import
2. It is different from actual io.reactivex.disposables.Disposable

Good question, i have the same problem