It is easier if you actually define a wrapper susp...

# coroutines

[elizarov]

It is easier if you actually define a wrapper suspending function for your `bigCompuitationThatTakesCallback`:

suspend fun bigCompuitationThatTakesCallback(params): ResultType = suspendCoroutine { c ->
  bigCompuitationThatTakesCallback(params, callback = { c.resume(it) })
}