@Test
public void test_list_file_fallback() throws Exception {

    List<Grandfather> grandfathers = config.list(Grandfather.class);
    assertThat(grandfathers.size(), is(3));
    for (Grandfather g : grandfathers) {
        if (g.getBeanId().equals("g10")) {
            assertGrandfather10(g);
        }
    }
}