long bits = doubleToRawLongBits(d);
    bits &= SIGNIFICAND_MASK;
    return (exponent == MIN_EXPONENT - 1) ? bits << 1 : bits | IMPLICIT_BIT;
  }

  static boolean isFinite(double d) {
    return getExponent(d) <= MAX_EXPONENT;
  }

  static boolean isNormal(double d) {
    return getExponent(d) >= MIN_EXPONENT;
  }

  /*
   * Returns x scaled by a power of 2 such that it is in the range [1, 2). Assumes x is positive,

        RepositoryListener repositoryListener = eventSpyDispatcher.chainListener(new LoggingRepositoryListener(logger));

        boolean recordReverseTree = Boolean.parseBoolean(
                mergedProps.getOrDefault(Constants.MAVEN_REPO_LOCAL_RECORD_REVERSE_TREE, Boolean.FALSE.toString()));
        if (recordReverseTree) {

    static <K extends @Nullable Object, V extends @Nullable Object> ValueEntry<K, V> newHeader() {
      return new ValueEntry<>(null, null, 0, null);
    }

    boolean matchesValue(@CheckForNull Object v, int smearedVHash) {
      return smearedValueHash == smearedVHash && Objects.equal(getValue(), v);
    }

    @Override
    public ValueSetLink<K, V> getPredecessorInValueSet() {

  @SuppressWarnings("unchecked") // implementation is "fully variant"
  static <T> Optional<T> withType() {
    return (Optional<T>) INSTANCE;
  }

  private Absent() {}

  @Override
  public boolean isPresent() {
    return false;
  }

  @Override
  public T get() {
    throw new IllegalStateException("Optional.get() cannot be called on an absent value");
  }

  @Override

@GwtCompatible
@ElementTypesAreNonnullByDefault
final class Present<T> extends Optional<T> {
  private final T reference;

  Present(T reference) {
    this.reference = reference;
  }

  @Override
  public boolean isPresent() {
    return true;
  }

  @Override
  public T get() {
    return reference;
  }

  @Override
  public T or(T defaultValue) {

    state = State.DONE;
    return null;
  }

  @Override
  public final boolean hasNext() {
    checkState(state != State.FAILED);
    switch (state) {
      case DONE:
        return false;
      case READY:
        return true;
      default:
    }
    return tryToComputeNext();
  }

  private boolean tryToComputeNext() {
    state = State.FAILED; // temporary pessimism
    next = computeNext();

        super(capacity);
    }

    /**
     * キーが含まれているかどうかを返します。
     *
     * @param key
     *            キー
     * @return キーが含まれているかどうか
     */
    public boolean containsKey(final String key) {
        return super.containsKey(convertKey(key));
    }

    @Override
    public V get(final Object key) {
        return super.get(convertKey(key));
    }

    @Override

     *
     * @param version the version to test, must not be {@code null}
     * @return {@code true} if this range contains the specified version, {@code false} otherwise
     */
    boolean contains(@Nonnull Version version);

    /**
     * Returns the upper boundary of this range, or {@code null} if none.
     */
    @Nullable
    Boundary getUpperBoundary();

    /**

            String groupId,
            String artifactId,
            VersionRange versionRange,
            String type,
            String classifier,
            String scope,
            boolean optional);

    Artifact createDependencyArtifact(
            String groupId,
            String artifactId,
            VersionRange versionRange,
            String type,
            String classifier,

    //                                                                         ===========
    @Override
    public boolean hasPrimaryKey() {
        return false;
    }

    @Override
    public boolean hasCompoundPrimaryKey() {
        return false;
    }

    @Override
    protected UniqueInfo cpui() {
        return null;
    }