public static IterableChecker<List<Integer>, Integer> check(@Nullable int[] actualIntArray) {
    return check(actualIntArray == null ? null : Ints.asList(actualIntArray));
  }
Convenient wrappers for matcher checking, designed for better code assist(completion) and
discoverability for most commonly used matchers.
testing/src/org/immutables/check/Checkers.java