*
 * @author Kevin Bourrillion
 * @since 1.0
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public final class Booleans {
  private Booleans() {}

  /** Comparators for {@code Boolean} values. */
  private enum BooleanComparator implements Comparator<Boolean> {
    TRUE_FIRST(1, "Booleans.trueFirst()"),
    FALSE_FIRST(-1, "Booleans.falseFirst()");

    private final int trueValue;

 *
 * @author Kevin Bourrillion
 * @since 1.0
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public final class Booleans {
  private Booleans() {}

  /** Comparators for {@code Boolean} values. */
  private enum BooleanComparator implements Comparator<Boolean> {
    TRUE_FIRST(1, "Booleans.trueFirst()"),
    FALSE_FIRST(-1, "Booleans.falseFirst()");

    private final int trueValue;

  }

  public void testReverseOrder() {
    SortedSet<String> set = ImmutableSortedSet.<String>reverseOrder().add("a", "b", "c").build();
    assertThat(set).containsExactly("c", "b", "a").inOrder();
    assertTrue(Comparators.isInOrder(Arrays.asList("c", "b", "a"), set.comparator()));
  }

  private static final Comparator<Object> TO_STRING =
      new Comparator<Object>() {
        @Override