@FfiNative<Handle Function(Pointer<Void>, Handle)>('PictureRecorder::endRecording')
  external void _endRecording(Picture outPicture);

https://github.com/flutter/engine/blob/main/lib/ui/painting.dart#L5664-L5665

Either the Dart return type should be Object or the native return type should be Void.

cc @dnfield, landing the static checks found another issue.

• Incorrect return type on an @FfiNative annotation causes segfault at runtime dart-lang/sdk#49471

I'll revert the added checks in Dart for now.