Support `@virtual` annotation on fields to allow field overrides in strong mode · Issue #27384 · dart-lang/sdk · GitHub
Experiment - Class annotation for disallowing use as a super-type, a.k.a "sealed classes" · Issue #11 · dart-lang/language · GitHub
![DART accurately identifies single voice and conservatively estimates... | Download Scientific Diagram DART accurately identifies single voice and conservatively estimates... | Download Scientific Diagram](https://www.researchgate.net/profile/Holly-Harris-2/publication/314272155/figure/fig1/AS:469390312382466@1488922779686/DART-accurately-identifies-single-voice-and-conservatively-estimates-multiple-and-no_Q640.jpg)