Iterable<TypeB> blist = filter(alist, TypeB.class);
    assertThat(blist).containsExactly(hasBoth).inOrder();
  }

  public void testTransform_iterator() {
    List<String> input = asList("1", "2", "3");
    Iterable<Integer> result =
        Iterables.transform(
            input,
            new Function<String, Integer>() {
              @Override