* iterable is empty, {@code Optional.absent()} is returned.
   *
   * <p><b>{@code Stream} equivalent:</b> if the goal is to obtain any element, {@link
   * Stream#findAny}; if it must specifically be the <i>first</i> element, {@code Stream#findFirst}.
   *
   * @throws NullPointerException if the first element is null; if this is a possibility, use {@code

		if objName <= startAfter || objName <= token {
			continue
		}
		if strings.HasPrefix(objName, prefix) {
			if count == maxKeys {
				isTruncated = true
				break
			}
			if delimiter != "" {
				i := strings.Index(objName[len(prefix):], delimiter)
				if i >= 0 {
					commonPrefix := objName[:len(prefix)+i+1]

	watcher, err := fsnotify.NewWatcher()
	if err != nil {
		return nil, fmt.Errorf("watcher create: %v", err)
	}

	fileModified, errChan := make(chan struct{}), make(chan error)
	go watchFiles(watcher, fileModified, errChan)

	for _, path := range paths {
		if !file.Exists(path) {
			log.Infof("file watcher skipping watch on non-existent path: %v", path)
			continue
		}
		if err := watcher.Add(path); err != nil {

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

        roles.add(SuggestConstants.DEFAULT_ROLE);
        if (!roles.isEmpty()) {
            filterList.add(buildFilterQuery(FieldNames.ROLES, roles));
        }

        if (!fields.isEmpty()) {

		if actualErr != nil && !testCase.shouldPass {
			if !strings.Contains(actualErr.Error(), testCase.expectedErr.Error()) {
				t.Errorf("Test %d: %s: Expected to fail with error \"%s\", but instead failed with error \"%s\" instead", i+1, instanceType, testCase.expectedErr.Error(), actualErr.Error())
			}
		}
		// Passes as expected, but asserting the results.
		if actualErr == nil && testCase.shouldPass {

        File userSettingsFile;

        if (commandLine.hasOption(CLIManager.ALTERNATE_USER_SETTINGS)) {
            userSettingsFile = new File(commandLine.getOptionValue(CLIManager.ALTERNATE_USER_SETTINGS));
            userSettingsFile = resolveFile(userSettingsFile, workingDirectory);

            if (!userSettingsFile.isFile()) {

		if err != nil {
			t.Errorf("(%d) failed to create http.Request, got %v", i, err)
		}
		if testCase.expected != ErrNone {
			// Should be set since we are simulating a http server.
			req.RequestURI = req.URL.RequestURI()
			// Check if it matches!
			errCode := doesPresignV2SignatureMatch(req)
			if errCode != testCase.expected {

		case "e":
			if dc.IsNil() {
				err = dc.ReadNil()
				if err != nil {
					err = msgp.WrapError(err, "Err")
					return
				}
				z.Err = nil
			} else {
				if z.Err == nil {
					z.Err = new(string)
				}
				*z.Err, err = dc.ReadString()
				if err != nil {
					err = msgp.WrapError(err, "Err")
					return
				}
			}
		case "t":
			z.T, err = dc.ReadTime()
			if err != nil {

  public static <E extends Enum<E>> ImmutableSet<E> immutableEnumSet(Iterable<E> elements) {
    if (elements instanceof ImmutableEnumSet) {
      return (ImmutableEnumSet<E>) elements;
    } else if (elements instanceof Collection) {
      Collection<E> collection = (Collection<E>) elements;
      if (collection.isEmpty()) {
        return ImmutableSet.of();
      } else {

		// because of this loop.
		for {
			if !globalCallhomeConfig.Enabled() {
				return
			}

			if !runCallhome(ctx, objAPI) {
				// callhome was disabled or context was canceled
				return
			}

			// callhome running on a different node.
			// sleep for some time and try again.
			duration := time.Duration(r.Float64() * float64(globalCallhomeConfig.FrequencyDur()))
			if duration < time.Second {