* (inclusive) to {@code upper} (inclusive). (These are the same values contained in {@code
   * Range.closed(lower, upper)}.)
   *
   * @throws IllegalArgumentException if {@code lower} is greater than {@code upper}
   * @since 23.0
   */
  public static ContiguousSet<Integer> closed(int lower, int upper) {
    return create(Range.closed(lower, upper), DiscreteDomain.integers());
  }

  /**

   * (inclusive) to {@code upper} (inclusive). (These are the same values contained in {@code
   * Range.closed(lower, upper)}.)
   *
   * @throws IllegalArgumentException if {@code lower} is greater than {@code upper}
   * @since 23.0
   */
  public static ContiguousSet<Integer> closed(int lower, int upper) {
    return create(Range.closed(lower, upper), DiscreteDomain.integers());
  }

  /**

   * or equal to {@code upper}.
   *
   * @throws IllegalArgumentException if {@code lower} is greater than {@code upper}
   * @throws ClassCastException if {@code lower} and {@code upper} are not mutually comparable
   * @since 14.0
   */
  public static <C extends Comparable<?>> Range<C> closed(C lower, C upper) {
    return create(Cut.belowValue(lower), Cut.aboveValue(upper));
  }

  /**

        // breakpoint...
        int lower = foundIndex;
        int upper = list.size() - 1;
        // Everything between lower and upper inclusive compares at >= 0.
        while (lower < upper) {
          int middle = (lower + upper + 1) >>> 1;
          int c = comparator.compare(list.get(middle), key);
          if (c > 0) {
            upper = middle - 1;
          } else { // c == 0
            lower = middle;
          }

   * or equal to {@code upper}.
   *
   * @throws IllegalArgumentException if {@code lower} is greater than {@code upper}
   * @throws ClassCastException if {@code lower} and {@code upper} are not mutually comparable
   * @since 14.0
   */
  public static <C extends Comparable<?>> Range<C> closed(C lower, C upper) {
    return create(Cut.belowValue(lower), Cut.aboveValue(upper));
  }

  /**

    assertThat(Ascii.toLowerCase(LOWER)).isSameInstanceAs(LOWER);
    assertThat(Ascii.toLowerCase(IGNORED)).isEqualTo(IGNORED);
    assertThat(Ascii.toLowerCase("fOobaR")).isEqualTo("foobar");
  }

  public void testToUpperCase() {
    assertThat(Ascii.toUpperCase(LOWER)).isEqualTo(UPPER);
    assertThat(Ascii.toUpperCase(UPPER)).isSameInstanceAs(UPPER);

    assertThat(Ascii.toLowerCase(LOWER)).isSameInstanceAs(LOWER);
    assertThat(Ascii.toLowerCase(IGNORED)).isEqualTo(IGNORED);
    assertThat(Ascii.toLowerCase("fOobaR")).isEqualTo("foobar");
  }

  public void testToUpperCase() {
    assertThat(Ascii.toUpperCase(LOWER)).isEqualTo(UPPER);
    assertThat(Ascii.toUpperCase(UPPER)).isSameInstanceAs(UPPER);

        // breakpoint...
        int lower = foundIndex;
        int upper = list.size() - 1;
        // Everything between lower and upper inclusive compares at >= 0.
        while (lower < upper) {
          int middle = (lower + upper + 1) >>> 1;
          int c = comparator.compare(list.get(middle), key);
          if (c > 0) {
            upper = middle - 1;
          } else { // c == 0
            lower = middle;
          }

    /**
     * Default load factor.
     */
    protected static final float DEFAULT_LOAD_FACTOR = 0.75f;

    /**
     * Upper limit on the number of entries.
     */
    protected final int limitSize;

    /**
     * Creates an {@link LruHashMap}.
     *
     * @param limitSize the upper limit on the number of entries
     */
    public LruHashMap(final int limitSize) {

        // Encode "TEST" (0x54 0x45 0x53 0x54)
        // T=0x54: upper nibble 0x5->F(0x46), lower nibble 0x4->E(0x45)
        src[1] = 'F';
        src[2] = 'E'; // T
        // E=0x45: upper nibble 0x4->E(0x45), lower nibble 0x5->F(0x46)
        src[3] = 'E';
        src[4] = 'F'; // E
        // S=0x53: upper nibble 0x5->F(0x46), lower nibble 0x3->D(0x44)
        src[5] = 'F';
        src[6] = 'D'; // S