public void testOf_last() {
    SortedSet<String> set = of("e", "f", "b", "d", "c");
    assertEquals("f", set.last());
  }

  @J2ktIncompatible
  @GwtIncompatible // SerializableTester
  public void testOf_serialization() {
    SortedSet<String> set = of("e", "f", "b", "d", "c");
    SortedSet<String> copy = SerializableTester.reserializeAndAssert(set);
    assertTrue(elementsEqual(set, copy));

        assertFalse(emptyBean.hasRole("admin"));
        assertFalse(emptyBean.hasGroup("developers"));
        assertFalse(emptyBean.hasGroups(new String[] { "developers" }));
    }

    public void test_serialization() {
        // Test that FessUserBean is serializable
        assertTrue(fessUserBean instanceof java.io.Serializable);

        // Test empty user bean is also serializable

        user = new TestRefreshableFessUser("testuser", false);
        assertFalse(user.refresh());
        assertEquals(1, user.getRefreshCount());
    }

    public void test_serialization() {
        // Test that implementations can be serialized
        FessUser user = new TestFessUser("testuser", new String[] { "role1", "role2" }, new String[] { "group1", "group2" },

            Predicates.in(differentOrder))
        .addEqualityGroup(Predicates.in(differentNums))
        .testEquals();
  }

  @J2ktIncompatible
  @GwtIncompatible // SerializableTester
  public void testIn_serialization() {
    checkSerialization(Predicates.in(Arrays.asList(1, 2, 3, null)));
  }

  public void testIn_handlesNullPointerException() {
    class CollectionThatThrowsNullPointerException<T> extends ArrayList<T> {