assertTrue(set instanceof SingletonImmutableSet);
    assertEquals(Lists.newArrayList("a"), Lists.newArrayList(set));
  }

  public void testCreation_oneDuplicate() {
    // now we'll get the varargs overload
    ImmutableSet<String> set =
        ImmutableSet.of("a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "a");
    assertEquals(

   *
   * <p><b>Note:</b> essentially the only reason to use this method is when you will need to add or
   * remove elements later. Otherwise, for non-null elements use {@link ImmutableList#of()} (for
   * varargs) or {@link ImmutableList#copyOf(Object[])} (for an array) instead. If any elements
   * might be null, or you need support for {@link List#set(int, Object)}, use {@link
   * Arrays#asList}.
   *

    assertTrue("addAll(containsNull) should return true", collection.addAll(containsNull));
    /*
     * We need (E) to force interpretation of null as the single element of a
     * varargs array, not the array itself
     */
    expectAdded((E) null);
  }

  @CollectionFeature.Require(value = SUPPORTS_ADD, absent = ALLOWS_NULL_VALUES)
  public void testAddAll_nullUnsupported() {

   * @param max the upper bound (inclusive) of the range to constrain {@code value} to
   * @throws IllegalArgumentException if {@code min > max}
   * @since 21.0
   */
  // A call to bare "min" or "max" would resolve to our varargs method, not to any static import.
  @SuppressWarnings("StaticImportPreferred")
  public static int constrainToRange(int value, int min, int max) {

    assertSame(a, numberOrdering.min(ints));
  }

  public void testVarargsMinAndMax() {
    // try the min and max values in all positions, since some values are proper
    // parameters and others are from the varargs array
    assertEquals(9, (int) numberOrdering.max(9, 3, 0, 5, 8));
    assertEquals(9, (int) numberOrdering.max(5, 9, 0, 3, 8));
    assertEquals(9, (int) numberOrdering.max(5, 3, 9, 0, 8));

    assertSame(a, numberOrdering.min(ints));
  }

  public void testVarargsMinAndMax() {
    // try the min and max values in all positions, since some values are proper
    // parameters and others are from the varargs array
    assertEquals(9, (int) numberOrdering.max(9, 3, 0, 5, 8));
    assertEquals(9, (int) numberOrdering.max(5, 9, 0, 3, 8));
    assertEquals(9, (int) numberOrdering.max(5, 3, 9, 0, 8));

    return LexicographicalComparator.INSTANCE;
  }

  enum LexicographicalComparator implements Comparator<int[]> {
    INSTANCE;

    @Override
    // A call to bare "min" or "max" would resolve to our varargs method, not to any static import.
    @SuppressWarnings("StaticImportPreferred")
    public int compare(int[] left, int[] right) {
      int minLength = Math.min(left.length, right.length);

    return LexicographicalComparator.INSTANCE;
  }

  enum LexicographicalComparator implements Comparator<int[]> {
    INSTANCE;

    @Override
    // A call to bare "min" or "max" would resolve to our varargs method, not to any static import.
    @SuppressWarnings("StaticImportPreferred")
    public int compare(int[] left, int[] right) {
      int minLength = Math.min(left.length, right.length);

    List<String> list = ImmutableList.of("a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k");
    assertEquals(Lists.newArrayList("a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k"), list);
  }

  // Varargs versions

  public void testCreation_twelveElements() {
    List<String> list =
        ImmutableList.of("a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l");
    assertEquals(

    List<String> list = ImmutableList.of("a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k");
    assertEquals(Lists.newArrayList("a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k"), list);
  }

  // Varargs versions

  public void testCreation_twelveElements() {
    List<String> list =
        ImmutableList.of("a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l");
    assertEquals(