@ElementTypesAreNonnullByDefault
public abstract class TreeTraverser<T> {

  /**
   * Returns a tree traverser that uses the given function to navigate from a node to its children.
   * This is useful if the function instance already exists, or so that you can supply a lambda
   * expressions. If those circumstances don't apply, you probably don't need to use this; subclass
   * {@code TreeTraverser} and implement its {@link #children} method directly.
   *

        .listFiles()
        ?.filter { it.isDirectory }
        ?.map { it.resolve("tmp-extracted-resources") }
        ?.filter { it.exists() }
        .orEmpty()

    private
    fun TestFilesCleanupProjectState.prepareReportsForCiPublishing(executedTaskPaths: List<String>, tmpTestFiles: Collection<File>) {
        val reports = executedTaskPaths

func (api objectAPIHandlers) ListenNotificationHandler(w http.ResponseWriter, r *http.Request) {
	ctx := newContext(r, w, "ListenNotification")

	defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))

	// Validate if bucket exists.
	objAPI := api.ObjectAPI()
	if objAPI == nil {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
		return
	}

	vars := mux.Vars(r)
	bucketName := vars["bucket"]

                // create it if necessary
                if ( ( flags & SmbConstants.O_EXCL ) == SmbConstants.O_EXCL ) {
                    // fail if already exists
                    this.createDisposition = FILE_CREATE;
                }
                else {
                    this.createDisposition = FILE_OPEN_IF;
                }
            }
            else {

                        installationSettingsFile != null && Files.exists(installationSettingsFile)
                                ? Source.fromPath(installationSettingsFile)
                                : null)
                .projectSettingsSource(
                        projectSettingsFile != null && Files.exists(projectSettingsFile)
                                ? Source.fromPath(projectSettingsFile)

        if (monitoringFilePath != null) {
            final Path path = env.configFile().resolve(monitoringFilePath);

            try {
                final File file = path.toFile();
                if (file.exists()) {
                    reloadableFile = file;
                    dictionaryTimestamp = reloadableFile.lastModified();

      skipDeprecated.set(true)
      jdkVersion.set(8)
      perPackageOption {
        matchingRegex.set(".*\\.internal.*")
        suppress.set(true)
      }
      if (project.file("Module.md").exists()) {
        includes.from(project.file("Module.md"))
      }
      externalDocumentationLink {
        url.set(URI.create("https://square.github.io/okio/3.x/okio/").toURL())

var errFileNameTooLong = StorageErr("file name too long")

// errVolumeExists - cannot create same volume again.
var errVolumeExists = StorageErr("volume already exists")

// errIsNotRegular - not of regular file type.
var errIsNotRegular = StorageErr("not of regular file type")

// errPathNotFound - cannot find the path.
var errPathNotFound = StorageErr("path not found")

                    syncContext.acquire(null, Collections.singleton(metadata));

                    if (metadata.getPath() != null && Files.exists(metadata.getPath())) {
                        try (InputStream in = Files.newInputStream(metadata.getPath())) {
                            versioning = new Versioning(

    public static final String CURRENT_ACCESSORS_OF_UPGRADED_PROPERTIES = "currentAccessorsOfUpgradedProperties";

    public static List<UpgradedProperty> parse(String path) {
        File file = new File(path);
        if (!file.exists()) {
            return Collections.emptyList();
        }
        try (FileReader reader = new FileReader(file)) {