the KEEP document about coroutines had `whileSelec...

# coroutines

[jmfayard]

the KEEP document about coroutines had whileSelect { onDefault { ... } }
can't find it inside kotlinx.coroutines. Is there something that replace it?
https://github.com/Kotlin/kotlin-coroutines/blob/master/examples/channel/channel-example-6.kt