anchor.diff:        actualFamily = family;
       }
   
  -    return _RegisteredFont(bytes, family, actualFamily!);
  +    return _RegisteredFont(bytes, family, actualFamily);
     }
   
     String? _readActualFamilyName(Uint8List bytes) {
  
positive.code:     fontProvider = canvasKit.TypefaceFontProvider.Make();
  
      for (var font in _registeredFonts) {
        fontProvider!.registerFont(font!.bytes, font!.flutterFamily);
      }
    }
  
  
negative.code:       <Future<_RegisteredFont>>[];
  
    /// Fonts which have been registered and loaded.
    final List<_RegisteredFont> _registeredFonts = <_RegisteredFont>[];
  
    final Set<String?> registeredFamilies = <String?>{};
  
  