`Map<K, Set<T>>` or `Map<K, Iterabl...

# stdlib

[gregorbg]

Map<K, Set<T>> or Map<K, Iterable<T>> will also be perfectly fine, I'm mainly concerned about the grouping aspect and not the explicit return type

[Pavlo Liapota]

https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/group-by.html ?

[gregorbg]

Thank you! :)