string to number when deserializing with fromJson ?

[aktxyz]

I have a class that has a double property, it deserializes just fine with "proper" json ... ie ("fontsize": 24 }

I would ALSO like to be able to deserialize with with "stringy" json (ie ie ("fontsize": "24" }

@freezed
abstract class WhackTextStyle with _$WhackTextStyle {
  const factory SWhackTextStyle({
    String? color,
    double? fontSize,
  }) = _WhackTextStyle;

This is the generated code for handling this double property ... are there any config or clever ways to have this also parse the string value to double ?

fontSize: (json['fontSize'] as num?)?.toDouble(),