As a matter of style, I’d actually recommend to ad...

# coroutines

[elizarov]

As a matter of style, I’d actually recommend to add Async suffix to greeting, that is name it fun greetingAsync(…): Future<String>, but drop Sync suffix from the other one, that is name it just fun greetingSevenDwarfs(): Sequence<String>. Async (future-returning) style of programming is quite error-prone, so it is better to make it explicit.