dynamic getNull() => null;

Iterable<dynamic> getIterableNull() sync* {}

Iterable<bool> getIterableBool() sync* {}

Iterable<bool> test1() sync* {}

Iterable<bool> test2() => getNull();

bool test3() => getNull();

Iterable<bool> test4() sync* {}

Iterable<bool> test5() => getIterableNull();

Iterable<bool> test6() => getIterableBool();

Iterable<bool> test7() sync* {}

test() async {}

main() {}