val context1 = Executors.newFixedThreadPool(2).asCoroutineDispatcher()
val context2 = newFixedThreadPoolContext(2, "Fixed")

val context1 = Executors.newFixedThreadPool(2).asCoroutineDispatcher()

repeat(4) {
    launch {
        withContext(context1) {
            Thread.sleep(2000)
        }
    }
}

context1.close()