Native iOS NSKeyedArchiver -> ARWorldMap.TryDeserialize

I have developed an iOS/ARKit app that functions as a content editor for my AR game. It has a fair amount of interface that I don't want to port over to Unity, but I want to be able to save my ARWorldMaps from the iOS editor app and load them into my Unity AR game.

I'm using NSKeyedArchiver to serialize my ARWorldMap like this:

Code (Swift):

1.  
2. func serializeMap(_ worldMap: ARWorldMap) -> Data {
3.     return try! NSKeyedArchiver.archivedData(
4.         withRootObject: worldMap,
5.         requiringSecureCoding: true
6.     )
7. }
8.  

Any ideas how I could use those bytes returned from `serializeMap` to load the map in Unity using `ARWorldMap.TryDeserialize` in AR Foundation?