Coroutine sample from KRUG meetup
Presentation: https://docs.google.com/presentation/d/1QJ_hDzXhdz9tIubQVGQmSM1n1NNYi3yIXdGHN_-d19g/
Links
https://habr.com/ru/company/alfa/blog/336228/
https://kotlinlang.org/docs/reference/coroutines/coroutines-guide.html
https://github.com/Kotlin/kotlinx.coroutines