fun main(args: Array<String>) {
    val hashMap = HashMap<String, Deferred<Int>>()

    GlobalScope.launch {
        delay(2000)
        println("done waiting")
        requireNotNull(hashMap["test"]).asCompletableFuture().complete(5)
    }

    runBlocking {
        val asyncThing = async {
            getNumberFive()
        }

        hashMap["test"] = asyncThing

        println(asyncThing.await())
    }
}