null safety , Flutter 2.0 ( Flutter Engage), Dart . Dartlang , !
API null safety
Dart, null safety , . (2.12.0–259.9.beta) dart.dev Flutter. null-safe Dart .
null-safe , null-safe Dart. — null-safe , args, yaml grpc. null-safe (, 1.0.0 1.0.0-nullsafety.123), !
pub.dev , , preview-, Dart SDK . Preview- , Dart SDK.
null safety , . Dart SDK pubspec. SDK, (CI). null-safe Dart ! !