static <E extends @Nullable Object> Collection<E> filterCollection(
      Collection<E> collection, Predicate<? super E> predicate) {
    if (collection instanceof Set) {
      return Sets.filter((Set<E>) collection, predicate);
    } else {
      return Collections2.filter(collection, predicate);
    }
  }

  @Override
  public boolean containsKey(@CheckForNull Object key) {
    return asMap().get(key) != null;
  }

  @Override

        // set function score
        final QueryBuilder queryBuilder = buildFunctionScoreQuery(query, q);
        builder.addSort("_score", SortOrder.DESC);

        // set filter query.
        final List<QueryBuilder> filterList = new ArrayList<>(10);
        if (!tags.isEmpty()) {
            filterList.add(buildFilterQuery(FieldNames.TAGS, tags));
        }

        if (childUrlSet != null) {
            // add an url
            try {
                storeChildUrls(childUrlSet.stream().filter(rd -> StringUtil.isNotBlank(rd.getUrl())).collect(Collectors.toSet()),
                        urlQueue.getUrl(), urlQueue.getDepth() != null ? urlQueue.getDepth() + 1 : 1);
            } catch (final Throwable t) {

    }

    // TODO return result
    public SuggestIndexResponse index(final SuggestItem[] items) {
        // TODO parallel?
        final SuggestItem[] array = Stream.of(items).filter(item -> !item.isBadWord(badWords)).toArray(n -> new SuggestItem[n]);

        try {
            final long start = System.currentTimeMillis();

      "$prefix/samples/guide/src/main/java/okhttp3/recipes",
      "$prefix/samples/guide/src/main/java/okhttp3/recipes/kt",
    ).map { File(it) }

  return directories.flatMap {
    it.listFiles().orEmpty().filter { f -> f.isFile }.toList()
  }
}

internal class MainTestProvider : SimpleProvider() {
  override fun arguments(): List<Any> {
    val mainFiles = mainFiles()
    return mainFiles.map {

        gradle.taskGraph.whenReady {
            val buildService: Provider<T> = gradle.sharedServices.registerIfAbsent("${klass.simpleName}-$rootProjectName", klass) {
                parameters.monitoredTaskPaths = allTasks.filter(taskFilter).map { if (isInBuildLogic) ":build-logic${it.path}" else it.path }.toSet()
            }
            gradle.serviceOf<BuildEventsListenerRegistry>().onTaskCompletion(buildService)

    }

    private void extractUpgradedProperties(FileCollection from, RegularFileProperty to) {
        String gradleApiInfoJarPrefix = getGradleApiInfoJarPrefix().get();
        File gradleRuntimeApiInfoJar = from.filter(file -> file.getName().startsWith(gradleApiInfoJarPrefix)).getSingleFile();
        URI uri = URI.create("jar:" + gradleRuntimeApiInfoJar.getAbsoluteFile().toURI());

    abstract val apiChangesDirectory: DirectoryProperty

    protected
    fun loadChanges(): Map<File, List<AcceptedApiChange>> {
        return apiChangesDirectory.get().asFile.listFiles()
            ?.filter {
                it.name.endsWith(".json")
            }?.associate {
                it to it.readAcceptedChanges()
            }?.filterValues {
                it.acceptedApiChanges != null
            }?.mapValues {

    }

    public void setHeaders(final Map<String, List<String>> headers) {
        if (headers != null) {
            final Map<String, List<String>> map = new HashMap<>();
            headers.entrySet().stream().filter(e -> e.getKey() != null)
                    .forEach(e -> map.put(e.getKey().toLowerCase(Locale.ROOT), e.getValue()));
            this.headers = map;
        }
    }

        if (session.getMavenSession().getAllProjects() != null) {
            session.getMavenSession().getAllProjects().stream()
                    .flatMap(this::getProjectArtifacts)
                    .filter(a -> Objects.equals(id, id(a)))
                    .forEach(a -> a.setFile(path != null ? path.toFile() : null));
        }
        if (path == null) {
            paths.remove(id);
        } else {