Bar(boolean isBaz) {
      this.isBaz = isBaz;
    }

    boolean isBaz() {
      return isBaz;
    }
  }

  /**
   * Validates that {@link Booleans#trueFirst()} and {@link Booleans#falseFirst()} can be used with
   * {@link Comparator} when replacing {@link ComparisonChain#compareTrueFirst} and {@link
   * ComparisonChain#compareFalseFirst}, as we document.
   */
  public void testTrueFirstFalseFirst() {

   *
   * <p>This is particularly useful in Java 8+ in combination with {@code Comparator.comparing},
   * e.g. {@code Comparator.comparing(Foo::hasBar, falseFirst())}.
   *
   * @since 21.0
   */
  public static Comparator<Boolean> falseFirst() {
    return BooleanComparator.FALSE_FIRST;
  }

  /**
   * Returns a hash code for {@code value}; obsolete alternative to {@link
   * Boolean#hashCode(boolean)}.
   *

   *
   * <p>This is particularly useful in Java 8+ in combination with {@code Comparator.comparing},
   * e.g. {@code Comparator.comparing(Foo::hasBar, falseFirst())}.
   *
   * @since 21.0
   */
  public static Comparator<Boolean> falseFirst() {
    return BooleanComparator.FALSE_FIRST;
  }

  /**
   * Returns a hash code for {@code value}; obsolete alternative to {@link
   * Boolean#hashCode(boolean)}.
   *

   * <i>if</i> the result of this comparison chain has not already been determined.
   *
   * <p>Java 8+ users: you can get the equivalent from {@link Booleans#falseFirst()}. For example:
   *
   * <pre>
   * Comparator.comparing(Foo::isBar, {@link Booleans#falseFirst()})
   * </pre>
   *
   * @since 12.0 (present as {@code compare} since 2.0)
   */

  }

  public void testFalseFirst() {
    assertThat(Booleans.falseFirst().compare(true, true)).isEqualTo(0);
    assertThat(Booleans.falseFirst().compare(false, false)).isEqualTo(0);
    assertThat(Booleans.falseFirst().compare(false, true)).isLessThan(0);
    assertThat(Booleans.falseFirst().compare(true, false)).isGreaterThan(0);
  }

  // We need to test that our method behaves like the JDK method.