void () { doTest( """ import java.util.stream.Stream; import java.util.*; abstract class StreamEx<T> implements Stream<T> { public <C extends Collection<? super T>> C into(C collection) { return null; } \s public static<T> StreamEx<T> of(T... values) { return null;\s } \s public static void main(String[] args) { List<Integer> list = new ArrayList<>(); StreamEx.of(1, 2, 3).into(list); } } """); }