Any plans to ship `OrderedTreeDictionary` and `OrderedTreeSet`?

Hi! Are there any plans for a future implementation of a OrderedTreeDictionary? I assume this would solve similar problems to the OrderedMap from Immutable JS… we could get the O(log(n)) copy-on-write updates (similar to TreeDictionary) while also preserving the order items were added (similar to OrderedDictionary).

A (potential) OrderedTreeSet could also be part of that release.

I'm not really blocked on anything for now… but I could think of interesting things to do with that data structure if we decide to ship it! Thanks!