Roman recommends always dispatch calls, without ch...

# coroutines

[gildor]

Roman recommends always dispatch calls, without check (in your dispatcher you check that current thread is main or not) - https://github.com/gildor/kotlin-coroutines-android/blob/wip-0.2.0/coroutines-android/src/main/kotlin/ru/gildor/coroutines/android/dispatcher/MainThreadDispatcher.kt#L16