*
   * <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}; equal to the result of invoking {@code ((Boolean)
   * value).hashCode()}.
   *

   *
   * <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}; equal to the result of invoking {@code ((Boolean)
   * value).hashCode()}.
   *

  }

  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);
  }

  public void testCompare() {
    for (boolean x : VALUES) {