return 1;
  }

  @Override
  public boolean contains(@CheckForNull Object target) {
    return element.equals(target);
  }

  @Override
  public UnmodifiableIterator<E> iterator() {
    return singletonIterator(element);
  }

  @Override
  public ImmutableList<E> asList() {
    return ImmutableList.of(element);
  }

  @Override
  boolean isPartialView() {
    return false;
  }

    out = null;

    // times out and throws RuntimeException on failure
    GcFinalization.awaitDone(
        new GcFinalization.FinalizationPredicate() {
          @Override
          public boolean isDone() {
            return !file.exists();
          }
        });
  }

public class SuggestBulkFileWriter implements SuggestWriter {
    @Override
    public SuggestWriterResult write(final Client client, final SuggestSettings settings, final String index, final SuggestItem[] items,
            final boolean update) {
        throw new UnsupportedOperationException("not yet.");
    }

    @Override
    public SuggestWriterResult delete(final Client client, final SuggestSettings settings, final String index, final String id) {

        public Config(final String value) {
            values = StreamUtil.split(value, Pattern.quote("|")).get(stream -> stream.map(String::trim).toArray(n -> new String[n]));
        }

        public boolean isCache() {
            for (final String value : values) {
                if ("cache".equalsIgnoreCase(value)) {
                    return true;
                }
            }
            // backward compatibility

        this.filters = new LinkedHashSet<>();
    }

    public OrArtifactFilter(Collection<ArtifactFilter> filters) {
        this.filters = new LinkedHashSet<>(filters);
    }

    public boolean include(Artifact artifact) {
        for (ArtifactFilter filter : filters) {
            if (filter.include(artifact)) {
                return true;
            }
        }

        return false;
    }

    /**
     * artifact, closer to the entry point, is selected
     */
    @Configuration(name = "closer-first", value = "true")
    private boolean closerFirst = true;

    /**
     * newer artifact is selected
     */
    @Configuration(name = "newer-first", value = "true")
    private boolean newerFirst = true;

    public MetadataGraphEdge apply(MetadataGraphEdge e1, MetadataGraphEdge e2) {
        int depth1 = e1.getDepth();

        }
        return 0L;
    }

    public boolean updateDocument(final SearchEngineClient searchEngineClient, final String id, final String field, final Object value) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        return searchEngineClient.update(fessConfig.getIndexDocumentUpdateIndex(), id, field, value);
    }

            // methods with primitive types will work correctly.
            if (parameterType.isPrimitive()) {
                if (parameterType.equals(Boolean.TYPE)) {
                    methodKey.append("java.lang.Boolean");
                } else if (parameterType.equals(Byte.TYPE)) {
                    methodKey.append("java.lang.Byte");
                } else if (parameterType.equals(Character.TYPE)) {

      this.closeable = closeable;
      this.thrown = thrown;
      this.suppressed = suppressed;
    }

    @Override
    public boolean equals(@Nullable Object obj) {
      if (obj instanceof Suppression) {
        Suppression other = (Suppression) obj;
        return closeable.equals(other.closeable)
            && thrown.equals(other.thrown)

        final AccessResult<String> accessResult = dataService.getAccessResult(sessionId, url);
        return accessResult != null;
    }

    @Override
    protected boolean exists(final String sessionId, final String url) {
        final boolean ret = super.exists(sessionId, url);
        if (!ret) {
            final QueueHolder queueHolder = getQueueHolder(sessionId);