Background Thread
Thread
Handler
Executor
Networking
Coroutine
Retrofit
================================================================
MORE AND MORE:
https://www.lukaslechner.com/understanding-kotlin-coroutines-with-this-mental-model/
https://kotlinlang.org/docs/coroutines-basics.html
https://android-developers.googleblog.com/2009/05/painless-threading.html
https://developer.android.com/guide/components/processes-and-threads
https://square.github.io/retrofit/
https://github.com/ChuckerTeam/chucker