Remove TODOs
Remove TODOs

First one is handled because the rewrite is essentially a no-op if there aren't parameters that need completing. Second one was incomplete but likely related to handling unknown types, but this is now handled with "supportedKinds".

Dart-Code/Dart-Code,Dart-Code/Dart-Code,Dart-Code/Dart-Code,Dart-Code/Dart-Code,Dart-Code/Dart-Code