+ exp
                + ", actual = "
                + actString);
      }
    }
    assertTrue("unexpected elements: " + act, act.isEmpty());
  }

  public static void assertContentsAnyOrder(Iterable<?> actual, Object... expected) {
    assertEqualIgnoringOrder(asList(expected), actual);
  }

  public static void assertContains(Iterable<?> actual, Object expected) {
    boolean contained = false;