final String[] loggerNames = loggerNamePrefix != null
                ? Arrays.stream(loggerNamePrefix.split(",")).map(String::trim).filter(s -> s.length() > 0).toArray(n -> new String[n])
                : new String[0];
        return new ErrorToWarnRewritePolicy(loggerNames);
    }

  abstract ImmutableCollection<E> delegateCollection();

  @Override
  public boolean contains(@CheckForNull Object target) {
    // The collection's contains() is at least as fast as ImmutableList's
    // and is often faster.
    return delegateCollection().contains(target);
  }

  @Override
  public int size() {
    return delegateCollection().size();
  }

  @Override
  public boolean isEmpty() {

        if (hasNoSuccess) {
            return Optional.empty();
        }

        List<String> remainingProjects = sortedProjects.stream()
                .filter(project -> result.getBuildSummary(project) == null
                        || result.getBuildSummary(project) instanceof BuildFailure)
                .map(project -> project.getGroupId() + ":" + project.getArtifactId())

        if (StringUtil.isNotBlank(fessConfig.getQueryFacetFields())) {
            field = StreamUtil.split(fessConfig.getQueryFacetFields(), ",")
                    .get(stream -> stream.map(String::trim).filter(StringUtil::isNotEmpty).distinct().toArray(n -> new String[n]));
        }
        if (StringUtil.isNotBlank(fessConfig.getQueryFacetFieldsSize())) {
            size = fessConfig.getQueryFacetFieldsSizeAsInteger();
        }

        return 0;
    }


    @Override
    public String toString () {
        return new String(
            "NtTransNotifyChange[" + super.toString() + ",fid=0x" + Hexdump.toHexString(this.fid, 4) + ",filter=0x"
                    + Hexdump.toHexString(this.completionFilter, 4) + ",watchTree=" + this.watchTree + "]");
    }

    Set<E> inEdgesV = inEdges(nodeV);
    return nodePairInvalidatableSet(
        outEdgesU.size() <= inEdgesV.size()
            ? unmodifiableSet(Sets.filter(outEdgesU, connectedPredicate(nodeU, nodeV)))
            : unmodifiableSet(Sets.filter(inEdgesV, connectedPredicate(nodeV, nodeU))),
        nodeU,
        nodeV);
  }

  @Override
  public Set<E> edgesConnecting(EndpointPair<N> endpoints) {

                  return map.entrySet().remove(o);
                }

                @Override
                public boolean removeIf(Predicate<? super Entry<String, String>> filter) {
                  return map.entrySet().removeIf(filter);
                }

                @Override
                public boolean containsAll(Collection<?> c) {
                  return map.entrySet().containsAll(c);
                }

    Set<E> inEdgesV = inEdges(nodeV);
    return nodePairInvalidatableSet(
        outEdgesU.size() <= inEdgesV.size()
            ? unmodifiableSet(Sets.filter(outEdgesU, connectedPredicate(nodeU, nodeV)))
            : unmodifiableSet(Sets.filter(inEdgesV, connectedPredicate(nodeV, nodeU))),
        nodeU,
        nodeV);
  }

  @Override
  public Set<E> edgesConnecting(EndpointPair<N> endpoints) {

        final String name = fessConfig.getQueryBrowserLangParameterName();
        if (StringUtil.isNotBlank(name)) {
            try {
                return requestManager.getParameter(name).filter(StringUtil::isNotBlank).map(LocaleUtils::toLocale);
            } catch (final Exception e) {
                logger.debug("Failed to parse a value of {}.", name, e);
            }
        }

        if (StringUtil.isNotBlank(logFilePath)) {
            final Path logDirPath = Paths.get(logFilePath);
            try (Stream<Path> stream = Files.list(logDirPath)) {
                stream.filter(entry -> isLogFilename(entry.getFileName().toString())).sorted().forEach(filePath -> {
                    final Map<String, Object> map = new HashMap<>();
                    final String name = filePath.getFileName().toString();