public void isIn(@Nullable Iterable<?> iterable) {
    checkNotNull(iterable);
    if (!contains(iterable, actual)) {
      failWithActual("expected any of", iterable);
    }
  }
@Test
  public void isInNullFailure() {
    expectFailure.whenTesting().that((String) null).isIn(oneShotIterable("a", "b", "c"));
  }