Coroutines.kt

object Coroutines {
   fun io(work: suspend (() -> Unit)): Job =
      CoroutineScope(Dispatchers.IO).launch {
          work()
      }
   fun <T: Any> ioThenMain(work: suspend (() -> T?), callback: ((T?) -> Unit)): Job =
      CoroutineScope(Dispatchers.Main).launch {
          val data = CoroutineScope(Dispatchers.IO).async rt@ {
              return@rt work()
          }.await()
          callback(data)
      }
}