I see that we are missing `Map.merge` function in ...

# stdlib

[marcinmoskala]

I see that we are missing Map.merge function in Kotlin:
https://docs.oracle.com/javase/8/docs/api/java/util/Map.html#merge-K-V-java.util.function.BiFunction-
I can easily add it using extension function. PR?

[Shawn]

are we missing it? I thought it was just provided on MutableMap instead

[marcinmoskala]

Well, but it cannot be used on immutable maps

[Shawn]

I don’t get it, isn’t .merge() a mutating method?

[marcinmoskala]

Well, we can have a version for immutable. Like marged or margedWith