}

  public void testLast_iterable() {
    Set<String> set = ImmutableSet.of("a", "b", "c");
    assertThat(FluentIterable.from(set).last()).hasValue("c");
  }

  public void testLast_emptyIterable() {
    Set<String> set = new HashSet<>();
    assertThat(FluentIterable.from(set).last()).isAbsent();
  }

  public void testSkip_simple() {