  @Test
  public void testGuavaFunction() {

    ImmutableList<GuavaRequest> gets = ImmutableList.of(GET("foo"));
    gets = FluentIterable.from(gets).transform(modPath(path -> "/" + path)).toList();
    assertThat(gets.size(), is(1));
    assertThat(getPath(gets.get(0)), is("/foo"));
  }