final bool inSoundMode = <int?>[] is! List<int>;
main() {}

class Class1 {
  int field;
  Class1(this.field);
}

abstract class Interface2 {
  int get field;
}

class Class2 implements Interface2 {
  final field;
  Class2(this.field);
}

testInferred() {}
expect(expected, actual) {}
throws(Function() f, {bool inSoundModeOnly: false}) {}