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

class Class1<T> {}

testGeneric() {}

class Class2<T extends num> {}

class Class3<T extends S, S> {}

class Class4<T extends Class4<T>> {}

class Class4int extends Class4<Class4int> {}

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