SortedSet<String> copy = SerializableTester.reserializeAndAssert(set);
    assertTrue(elementsEqual(set, copy));
    assertEquals(set.comparator(), copy.comparator());
  }

  public void testReverseOrder() {
    SortedSet<String> set = ImmutableSortedSet.<String>reverseOrder().add("a", "b", "c").build();
    assertThat(set).containsExactly("c", "b", "a").inOrder();