How i can batch list in Kotlin?

Can you elaborate?

for example:

listOf(1,2,3,4,5,6,7,8,9,10)
            .map { element -> async { delay(1000); element * 2 }}
            .awaitAll()
            .forEach(::println)

How i can chunk it, send only 2 elements compute it in parallel and after send next 2 elements?