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kotlinlang

it looks like kotlin stdlib does not have anything similar to java's SortedSet, am I missing anything?

you're not missing anything, it's currently JVM-only (Kotlin's `sortedSetOf()`/`.toSortedSet()` return `java.util.SortedSet`, not `kotlin.collections.*`). <https://youtrack.jetbrains.com/issue/KT-38356/Add-SortedMap-to-common-standard-library>

all the default collections are order-preserving, that's not what `sortedSetOf()` does (in response to Norbi's now deleted comment)