private final int end; // exclusive

  private ImmutableLongArray(long[] array) {
    this(array, 0, array.length);
  }

  private ImmutableLongArray(long[] array, int start, int end) {
    this.array = array;
    this.start = start;
    this.end = end;
  }

  /** Returns the number of values in this array. */
  public int length() {
    return end - start;
  }

  private final int end; // exclusive

  private ImmutableIntArray(int[] array) {
    this(array, 0, array.length);
  }

  private ImmutableIntArray(int[] array, int start, int end) {
    this.array = array;
    this.start = start;
    this.end = end;
  }

  /** Returns the number of values in this array. */
  public int length() {
    return end - start;
  }

    assertSame(
        "toArray(sameSizeE[]) should return the given array", array, collection.toArray(array));
    expectArrayContentsInOrder(getOrderedElements(), array);
  }

  public void testToArray_rightSizedArrayOfObject() {
    Object[] array = new Object[getNumElements()];
    assertSame(
        "toArray(sameSizeObject[]) should return the given array",
        array,

   * @since 23.1
   */
  public static void sort(int[] array, int fromIndex, int toIndex) {
    checkNotNull(array);
    checkPositionIndexes(fromIndex, toIndex, array.length);
    for (int i = fromIndex; i < toIndex; i++) {
      array[i] = flip(array[i]);
    }
    Arrays.sort(array, fromIndex, toIndex);
    for (int i = fromIndex; i < toIndex; i++) {
      array[i] = flip(array[i]);
    }
  }

  /**

    assertThat(Chars.concat(ARRAY1)).isEqualTo(ARRAY1);
    assertThat(Chars.concat(ARRAY1)).isNotSameInstanceAs(ARRAY1);
    assertThat(Chars.concat(EMPTY, ARRAY1, EMPTY)).isEqualTo(ARRAY1);
    assertThat(Chars.concat(ARRAY1, ARRAY1, ARRAY1))
        .isEqualTo(new char[] {(char) 1, (char) 1, (char) 1});
    assertThat(Chars.concat(ARRAY1, ARRAY234))

    assertThat(Longs.concat(ARRAY1)).isEqualTo(ARRAY1);
    assertThat(Longs.concat(ARRAY1)).isNotSameInstanceAs(ARRAY1);
    assertThat(Longs.concat(EMPTY, ARRAY1, EMPTY)).isEqualTo(ARRAY1);
    assertThat(Longs.concat(ARRAY1, ARRAY1, ARRAY1)).isEqualTo(new long[] {1L, 1L, 1L});
    assertThat(Longs.concat(ARRAY1, ARRAY234)).isEqualTo(new long[] {1L, 2L, 3L, 4L});
  }

    assertThat(Doubles.concat(ARRAY1)).isEqualTo(ARRAY1);
    assertThat(Doubles.concat(ARRAY1)).isNotSameInstanceAs(ARRAY1);
    assertThat(Doubles.concat(EMPTY, ARRAY1, EMPTY)).isEqualTo(ARRAY1);
    assertThat(Doubles.concat(ARRAY1, ARRAY1, ARRAY1)).isEqualTo(new double[] {1.0, 1.0, 1.0});
    assertThat(Doubles.concat(ARRAY1, ARRAY234)).isEqualTo(new double[] {1.0, 2.0, 3.0, 4.0});
  }

    assertThat(Shorts.concat(ARRAY1)).isEqualTo(ARRAY1);
    assertThat(Shorts.concat(ARRAY1)).isNotSameInstanceAs(ARRAY1);
    assertThat(Shorts.concat(EMPTY, ARRAY1, EMPTY)).isEqualTo(ARRAY1);
    assertThat(Shorts.concat(ARRAY1, ARRAY1, ARRAY1))
        .isEqualTo(new short[] {(short) 1, (short) 1, (short) 1});
    assertThat(Shorts.concat(ARRAY1, ARRAY234))

  }

  /**
   * @return an array of the proper size with {@code null} as the key of the middle element.
   */
  protected Entry<K, V>[] createArrayWithNullKey() {
    Entry<K, V>[] array = createSamplesArray();
    int nullKeyLocation = getNullLocation();
    Entry<K, V> oldEntry = array[nullKeyLocation];
    array[nullKeyLocation] = mapEntry(null, oldEntry.getValue());
    return array;
  }

  /**

          array[i] = counter.getAndIncrement();
        }
        builder.addAll(ImmutableLongArray.copyOf(array));
      }
    },
    ADD_LARGER_ARRAY {
      @Override
      void doIt(ImmutableLongArray.Builder builder, AtomicLong counter) {
        long[] array = new long[random.nextInt(200) + 200];
        for (int i = 0; i < array.length; i++) {
          array[i] = counter.getAndIncrement();
        }