class Class1 {}

class Class2 {
  Class2.named();
}

class Class3 {
  Class3(this.field);
  final int field;
}

class Class4 {
  Class4([this.field]);
  final int? field;
}

class Class5 {
  Class5(this.field1, [this.field2]);
  final int? field2;
  final int field1;
}

class Class6 {
  Class6(this.field1, {this.field2, required this.field3});
  final int? field2;
  final int field1;
  final int field3;
}

expect(expected, actual) {}
final bool inSoundMode = <int?>[] is! List<int>;
main() {}
testArgs() {}
testNoArgs() {}
throws(Function() f, {bool inSoundModeOnly: false}) {}