Dealing with void and null in RxJava 2

The Problem I recently updated my RxJava dependency from version 1.x to 2.x. Everything looks very good in RxJava world - new version seems to be more coherent and consistent. Much cleaner. You can find large amount of details in an official RxJava Github Repo. First sentences on this page say that: RxJava 2.0 has been completely rewritten from scratch on top of the Reactive-Streams specification. The specification itself has evolved out of RxJava 1.

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