assertTrue(set.tailSet("california") instanceof ImmutableSortedSet);
    assertTrue(set.tailSet("fish") instanceof ImmutableSortedSet);
    assertThat(set.tailSet("fish")).containsExactly("over", "quick", "jumped").inOrder();
    assertThat(set.tailSet("a"))
        .containsExactly("a", "in", "the", "over", "quick", "jumped")
        .inOrder();
    assertTrue(set.tailSet("california").isEmpty());
  }