// Note: Ints.asList's iterator does not support remove which we need for testing.
    return new ArrayList<>(Ints.asList(values)).iterator();
  }

  public void testElementsEqual() {
    Iterable<?> a;
    Iterable<?> b;

    // Base case.
    a = new ArrayList<>();
    b = emptySet();
    assertTrue(elementsEqual(a.iterator(), b.iterator()));

    // A few elements.