anchor.diff:        <Future<_RegisteredFont>>[];
   
     /// Fonts which have been registered and loaded.
  -  final List<_RegisteredFont?> _registeredFonts = <_RegisteredFont?>[];
  +  final List<_RegisteredFont> _registeredFonts = <_RegisteredFont>[];
   
     final Set<String?> registeredFamilies = <String?>{};
   
  
positive.code:     fontProvider = canvasKit.TypefaceFontProvider.Make();
  
      for (var font in _registeredFonts) {
        fontProvider!.registerFont(font!.bytes, font!.flutterFamily);
      }
    }
  
  
negative.code:     if (_unloadedFonts.isEmpty) {
        return;
      }
      final List<_RegisteredFont?> loadedFonts =
          await Future.wait(_unloadedFonts);
      for (_RegisteredFont? font in loadedFonts) {
        if (font != null) {
          _registeredFonts.add(font);
        }
      }
      _unloadedFonts.clear();
    }
  
  