return (i == Integer.MIN_VALUE) ? null : i - 1;
    }

    @Override
    Integer offset(Integer origin, long distance) {
      checkNonnegative(distance, "distance");
      return Ints.checkedCast(origin.longValue() + distance);
    }

    @Override
    public long distance(Integer start, Integer end) {
      return (long) end - start;
    }

    @Override
    public Integer minValue() {
      return Integer.MIN_VALUE;

   */
  public static int floorPowerOfTwo(int x) {
    checkPositive("x", x);
    return Integer.highestOneBit(x);
  }

  /**
   * Returns {@code true} if {@code x} represents a power of two.
   *
   * <p>This differs from {@code Integer.bitCount(x) == 1}, because {@code
   * Integer.bitCount(Integer.MIN_VALUE) == 1}, but {@link Integer#MIN_VALUE} is not a power of two.
   */
  public static boolean isPowerOfTwo(int x) {

    ImmutableTable.Builder<String, String, Integer> zis =
        ImmutableTable.<String, String, Integer>builder().put("one", "uno", 1).put("two", "dos", 2);
    ImmutableTable.Builder<String, String, Integer> zat =
        ImmutableTable.<String, String, Integer>builder()
            .put("one", "eins", 1)
            .put("two", "twei", 2);
    ImmutableTable<String, String, Integer> table = zis.combine(zat).build();

  private static class IterableIterator implements Iterable<Integer>, Iterator<Integer> {
    private static final ImmutableSet<Integer> INTEGERS = ImmutableSet.of(1, 2, 3, 4);
    private final Iterator<Integer> iterator;

    public IterableIterator() {
      this.iterator = iterator();
    }

    @Override
    public Iterator<Integer> iterator() {
      return INTEGERS.iterator();
    }

    @Override

      return (i == Integer.MIN_VALUE) ? null : i - 1;
    }

    @Override
    Integer offset(Integer origin, long distance) {
      checkNonnegative(distance, "distance");
      return Ints.checkedCast(origin.longValue() + distance);
    }

    @Override
    public long distance(Integer start, Integer end) {
      return (long) end - start;
    }

    @Override
    public Integer minValue() {
      return Integer.MIN_VALUE;

/**
 * {@link Integer}用の変換ユーティリティです。
 *
 * @author higa
 */
public abstract class IntegerConversionUtil {

    /**
     * {@link Integer}に変換します。
     *
     * @param o
     *            変換元のオブジェクト
     * @return 変換された{@link Integer}
     */
    public static Integer toInteger(final Object o) {
        return toInteger(o, null);
    }

    /**

    String INDEXER_LANGUAGE_FIELDS = "indexer.language.fields";

    /** The key of the configuration. e.g. 1000 */
    String INDEXER_LANGUAGE_DETECT_LENGTH = "indexer.language.detect.length";

    /** The key of the configuration. e.g. 10000 */
    String INDEXER_MAX_RESULT_WINDOW_SIZE = "indexer.max.result.window.size";

    /** The key of the configuration. e.g. 50000 */

    @Override
    public Entry<String, Integer>[] createArray(int length) {
      return (Entry<String, Integer>[]) new Entry<?, ?>[length];
    }

    @Override
    public Iterable<Entry<String, Integer>> order(List<Entry<String, Integer>> insertionOrder) {
      return new Ordering<Entry<String, Integer>>() {
        @Override
        public int compare(Entry<String, Integer> left, Entry<String, Integer> right) {

    assertMean(0, 0, 0);
    assertMean(-1, -1, -1);
    assertMean(Integer.MIN_VALUE, Integer.MIN_VALUE, Integer.MIN_VALUE);
    assertMean(Integer.MAX_VALUE, Integer.MAX_VALUE, Integer.MAX_VALUE);

    // Exhaustive checks
    for (int x : ALL_INTEGER_CANDIDATES) {
      for (int y : ALL_INTEGER_CANDIDATES) {
        assertMean(x, y);
      }
    }
  }

  }

  private static void runConcurrentlyMutatedTest(
      Collection<Integer> initialContents,
      Iterable<ListFrobber> actionsToPerformConcurrently,
      WrapWithIterable wrap) {
    ConcurrentlyMutatedList<Integer> concurrentlyMutatedList =
        newConcurrentlyMutatedList(initialContents, actionsToPerformConcurrently);

    Iterable<Integer> iterableToCopy =
        wrap == WrapWithIterable.WRAP