I have a Java function which I converted to Kotlin...

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[stevenheidel]

I have a Java function which I converted to Kotlin:
fun getInferredCurrentCompanies(memberPositions: Map<Urn, Set<Long>>):

But I can't seem to do much with the memberPositions value. For instance, I'm trying to map over all the keys, and was expecting this to work:
memberPositions.keys.map { } but the map is not picked up as a function on the Set<Urn>. In fact, there only seem to be 6 functions on Set that I can use.