is this a correct implementation for `await`ing an...

# coroutines

[kirillrakhman]

is this a correct implementation for `await`ing an observable?

fun <V> Observable<V>.subscribeWithContinuation(x: Continuation<V>) = subscribe(x::resume, x::resumeWithException)!!

suspend fun <V> Observable<V>.awaitFirst() : V = suspendCoroutine {
    first().subscribeWithContinuation(it)
}