return backingIterator().previousIndex();
  }

  @Override
  public void set(@ParametricNullness T element) {
    throw new UnsupportedOperationException();
  }

  @Override
  public void add(@ParametricNullness T element) {
    throw new UnsupportedOperationException();
  }

  @MapFeature.Require(SUPPORTS_PUT)
  public void testComputeIfAbsent_supportedAbsent() {
    assertEquals(
        "computeIfAbsent(notPresent, function) should return new value",
        v3(),
        getMap()
            .computeIfAbsent(
                k3(),
                k -> {
                  assertEquals(k3(), k);
                  return v3();
                }));

        final String[] baseRoles = roles != null ? roles
                : ComponentUtil.getRoleQueryHelper().build(searchRequestType).stream().filter(StringUtil::isNotBlank)
                        .toArray(n -> new String[n]);
        final String[] baseFields = fields != null ? fields : fessConfig.getSuggestPopularWordFieldsAsArray();

    }
    throw new IllegalStateException("Unexpected edge type: " + edgeType);
  }

  private static EdgeType oppositeType(EdgeType edgeType) {
    switch (edgeType) {
      case UNDIRECTED:
        return EdgeType.DIRECTED;
      case DIRECTED:
        return EdgeType.UNDIRECTED;
    }
    throw new IllegalStateException("Unexpected edge type: " + edgeType);
  }

  @Test

    }
    throw new IllegalStateException("Unexpected edge type: " + edgeType);
  }

  private static EdgeType oppositeType(EdgeType edgeType) {
    switch (edgeType) {
      case UNDIRECTED:
        return EdgeType.DIRECTED;
      case DIRECTED:
        return EdgeType.UNDIRECTED;
    }
    throw new IllegalStateException("Unexpected edge type: " + edgeType);
  }

  @Test

  @Override
  public Hasher newHasher() {
    Hasher[] hashers = new Hasher[functions.length];
    for (int i = 0; i < hashers.length; i++) {
      hashers[i] = functions[i].newHasher();
    }
    return fromHashers(hashers);
  }

  @Override
  public Hasher newHasher(int expectedInputSize) {
    checkArgument(expectedInputSize >= 0);
    Hasher[] hashers = new Hasher[functions.length];
    for (int i = 0; i < hashers.length; i++) {

public class HotThreadMonitorTarget extends MonitorTarget {
    private static final Logger logger = LogManager.getLogger(HotThreadMonitorTarget.class);

    @Override
    public void expired() {
        final StringBuilder buf = new StringBuilder(1000);

        buf.append("[HOTTHREAD MONITOR] ");

        final FessConfig fessConfig = ComponentUtil.getFessConfig();

        buf.append('{');

            return builder.getOutputStream();
        } catch (final IOException e) {
            if (logger.isDebugEnabled()) {
                logger.debug("Failed to print the output.", e);
            }
            return new ByteArrayOutputStream();
        }
    }

    public static OutputStream getXContentOutputStream(final ToXContent xContent, final MediaType mediaType) {

    public int load() {
        final Map<String, Map<String, String[]>> relatedQueryMap = new HashMap<>();
        getAvailableRelatedQueryList().stream().forEach(entity -> {
            final String key = getHostKey(entity);
            Map<String, String[]> map = relatedQueryMap.get(key);
            if (map == null) {
                map = new HashMap<>();
                relatedQueryMap.put(key, map);
            }

    int spaceInAscii = 32;
    int sevenBitAsciiMax = 128;
    StringBuilder sb = new StringBuilder(sevenBitAsciiMax - spaceInAscii);
    for (int ch = spaceInAscii; ch < sevenBitAsciiMax; ch++) {
      sb.append((char) ch);
    }
    ASCII_CHARACTERS = sb.toString();
  }

  private static final String ALL_DIGITS;

  static {
    StringBuilder sb = new StringBuilder();
    String zeros =