Dart has excellent null handling[0] so I am not sure if you're perhaps talking of another language? It has had this since release 3.0, if I recall, and has been

Dart has excellent null handling[0] so I am not sure if you're perhaps talking of another language? It has had this since release 3.0, if I recall, and has been out for quite a while. https://dart.dev/null-safety https://dart.dev/null-safety