(Iterable<String>) delegate.invoke(null, "a", ImmutableList.of("b", "c"));
    assertEquals(ImmutableList.of("a", "b", "c"), ImmutableList.copyOf(result));
  }

  public void testStaticMethod_returning() throws Exception {
    Invokable<?, Iterable<String>> delegate =
        Prepender.method("prepend", String.class, Iterable.class)
            .returning(new TypeToken<Iterable<String>>() {});