Interactive Foliage

While setting up a custom interactive foliage system I stumbled upon a few engine classes related to interactive foliage (AInteractiveFoliageActor, UInteractiveFoliageComponent). I was really surprised by that because I didn’t know that UE4 might support interactive foliage by default (does it?) but I can’t seem to find any sort of documentation or even mention to these classes other than C++ API reference.
My question is: What is this in-engine Interactive foliage and how do I use it?

Quite possible that those are just remains from UDK.