newtype dart proposal: https://github.com/dart-lang/language/blob/master/working/static%20wrapper%20types/feature-specification.md https://github.com/dart-lang/

newtype dart proposal: https://github.com/dart-lang/language/blob/master/working/static%20wrapper%20types/feature-specification.md https://github.com/dart-lang/language/blob/master/working/st...