.addEqualityGroup(isOdd())
        .addEqualityGroup(Predicates.alwaysTrue())
        .testEquals();
  }

  @J2ktIncompatible
  @GwtIncompatible // SerializableTester
  public void testAlwaysFalse_serialization() {
    checkSerialization(Predicates.alwaysFalse());
  }

  /*
   * Tests for Predicates.not(predicate).
   */

  public void testNot_apply() {