ImmutableSet<Integer> unused = builder.build();
    }
  }

  @GwtIncompatible("Builder impl")
  public void testPresizedBuilderDedups() {
    ImmutableSet.Builder<String> builder = ImmutableSet.builderWithExpectedSize(4);
    builder.add("a");
    assertEquals(1, builder.size);
    builder.add("a");
    assertEquals(1, builder.size);
    builder.add("b", "c", "d");
    assertEquals(4, builder.size);

    @Override
    protected Set<String> create(String[] elements) {
      ImmutableSet.Builder<String> builder =
          ImmutableSet.builderWithExpectedSize(newHashSet(elements).size());
      for (String e : elements) {
        builder.add(e);
      }
      return builder.build();
    }
  }

    @Override
    protected Set<String> create(String[] elements) {
      ImmutableSet.Builder<String> builder =
          ImmutableSet.builderWithExpectedSize(newHashSet(elements).size());
      for (String e : elements) {
        builder.add(e);
      }
      return builder.build();
    }
  }

    Collections.reverse(list);
    return unsafeDelegateList(list);
  }

  public static <E> Builder<E> builder() {
    return new Builder<E>();
  }

  public static <E> Builder<E> builderWithExpectedSize(int expectedSize) {
    return new Builder<E>(expectedSize);
  }

  public static final class Builder<E> extends ImmutableCollection.Builder<E> {
    private final ArrayList<E> contents;

   * from consumers of {@code ImmutableSortedSet}.
   *
   * @throws UnsupportedOperationException always
   * @deprecated Not supported by ImmutableSortedSet.
   */
  @DoNotCall("Use naturalOrder (which does not accept an expected size)")
  @Deprecated
  public static <E> ImmutableSortedSet.Builder<E> builderWithExpectedSize(int expectedSize) {

  }

  @GwtIncompatible
  public void testBuilderExactlySizedReusesArray() {
    ImmutableBiMap.Builder<Integer, Integer> builder = ImmutableBiMap.builderWithExpectedSize(10);
    Entry<Integer, Integer>[] builderArray = builder.entries;
    for (int i = 0; i < 10; i++) {
      builder.put(i, i);
    }
    Entry<Integer, Integer>[] builderArrayAfterPuts = builder.entries;

  }

  @GwtIncompatible
  public void testBuilderExactlySizedReusesArray() {
    ImmutableMap.Builder<Integer, Integer> builder = ImmutableMap.builderWithExpectedSize(10);
    Object[] builderArray = builder.alternatingKeysAndValues;
    for (int i = 0; i < 10; i++) {
      builder.put(i, i);
    }
    Object[] builderArrayAfterPuts = builder.alternatingKeysAndValues;

      ImmutableList<Integer> unused = builder.build();
    }
  }

  @GwtIncompatible
  public void testBuilderExactlySizedReusesArray() {
    ImmutableList.Builder<Integer> builder = ImmutableList.builderWithExpectedSize(10);
    Object[] builderArray = builder.contents;
    for (int i = 0; i < 10; i++) {
      builder.add(i);
    }
    Object[] builderArrayAfterAdds = builder.contents;

   * but not exactly, the number of entries added to the builder.
   *
   * @since 23.1
   */
  public static <K, V> Builder<K, V> builderWithExpectedSize(int expectedSize) {
    checkNonnegative(expectedSize, "expectedSize");
    return new Builder<>(expectedSize);
  }

  /**

   * from consumers of {@code ImmutableSortedSet}.
   *
   * @throws UnsupportedOperationException always
   * @deprecated Not supported by ImmutableSortedSet.
   */
  @DoNotCall("Use naturalOrder (which does not accept an expected size)")
  @Deprecated
  public static <E> ImmutableSortedSet.Builder<E> builderWithExpectedSize(int expectedSize) {