PassingDispatcherManually.kt

fun main() {
    launch(Dispatcher.Background) {
        fun1(Dispatcher.Background)
    }
}

suspend fun fun1(dispatcher: Dispatcher){
    ...
    fun2(dispatcher)
    ...
}

suspend fun fun2(dispatcher: Dispatcher){
    ...
    when (dispatcher) {
        Dispatcher.Main -> Handler(Looper.getMainLooper()).post { cont.resumeWith() }
        Dispatcher.Background -> thread { cont.resumeWith() }
    }
    ...
}