SP2: Adding Rooms to Spaces #523o

- update after review

RiotSwiftUI/Modules/Spaces/AddRoomSelector/Service/AddRoomItemsProcessor.swift

@@ -44,8 +44,11 @@ class AddRoomItemsProcessor: MatrixItemChooserProcessorProtocol {
     
     // MARK: Private
     
+    // Add room with roomId from list of room IDs at index to the parentSpace.
+    // Recurse to the next index once done.    
     func addChild(from roomIds: [String], at index: Int, completion: @escaping (Result<Void, Error>) -> Void) {
         guard index < roomIds.count else {
+            // last item has been processed or list is empty --> the recursion has finished
             completion(Result.success(()))
             return
         }