public suspend fun <T> withTimeout(timeMillis: Long, block: suspend CoroutineScope.() -> T): T {
    if (timeMillis <= 0L) throw TimeoutCancellationException("Timed out immediately")
    return suspendCoroutineUninterceptedOrReturn { uCont ->
        setupTimeout(TimeoutCoroutine(timeMillis, uCont), block)
    }
}