```fun getUserFromDB id Long String cache computeIfAbsent ag kotlinlang #announcements

```fun getUserFromDB(id: Long): String? cache.com...

opas90

01/17/2017, 1:05 AM

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fun getUserFromDB(id: Long): String? 
cache.computeIfAbsent(agentId, { id -> getUserFromDB(agentId)})

it gives me an error since getUserFromDB has String? return type which can not be used with the supplied function