err = unwrapAll(err)
	switch err {
	case errDiskStale:
		w.WriteHeader(http.StatusPreconditionFailed)
	case errFileNotFound, errFileVersionNotFound:
		w.WriteHeader(http.StatusNotFound)
	case errInvalidAccessKeyID, errAccessKeyDisabled, errNoAuthToken, errMalformedAuth, errAuthentication, errSkewedAuthTime:
		w.WriteHeader(http.StatusUnauthorized)
	case context.Canceled, context.DeadlineExceeded:
		w.WriteHeader(499)

     */
    public byte[] fromObjectToBinary(final Object obj) {
        final String serializer = getSerializerType();
        return switch (serializer) {
        case KRYO -> serializeWithKryo(obj);
        case JAVABIN -> SerializeUtil.fromObjectToBinary(obj);
        default -> throw new IllegalArgumentException("Unexpected value: " + serializer);
        };
    }

    /**

                switch (bufferType) {
                case PacConstants.LOGON_INFO:
                    // PAC Credential Information
                    if (this.logonInfo == null) {
                        this.logonInfo = new PacLogonInfo(bufferData);
                    }
                    break;
                case PacConstants.CREDENTIAL_TYPE:
                    // PAC Credential Type

## Optional parameters { #optional-parameters }

The same way, you can declare optional query parameters, by setting their default to `None`:

{* ../../docs_src/query_params/tutorial002_py310.py hl[7] *}

In this case, the function parameter `q` will be optional, and will be `None` by default.

/// check

        switch (action) {
            case FILE_ACTION_ADDED: return DirectoryChangeType.FILE_ADDED;
            case FILE_ACTION_REMOVED: return DirectoryChangeType.FILE_REMOVED;
            case FILE_ACTION_MODIFIED: return DirectoryChangeType.FILE_MODIFIED;
            case FILE_ACTION_RENAMED_OLD_NAME:
            case FILE_ACTION_RENAMED_NEW_NAME: return DirectoryChangeType.DIRECTORY_RENAMED;

    return copyOf(elements);
  }

  @JsMethod
  public static <E> ImmutableSet<E> copyOf(E[] elements) {
    checkNotNull(elements);
    switch (elements.length) {
      case 0:
        return of();
      case 1:
        return of(elements[0]);
      default:
        return create(elements);
    }
  }

  public static <E> ImmutableSet<E> copyOf(Collection<? extends E> elements) {

// set new encryption metadata from http request headers for SSE-C and generated key from KMS in the case of
// SSE-S3
func setEncryptionMetadata(r *http.Request, bucket, object string, metadata map[string]string) (err error) {
	var (
		key    []byte
		keyID  string
		kmsCtx kms.Context
	)
	kind, _ := crypto.IsRequested(r.Header)
	switch kind {
	case crypto.SSEC:
		key, err = ParseSSECustomerRequest(r)
		if err != nil {

	r, w := 0, 0
	if rooted {
		r, w = 1, 1
	}

	for r < n {
		switch {
		case path[r] > 127:
			// Non ascii.
			return true
		case path[r] == '/':
			// multiple / elements
			return true
		case path[r] == '.' && (r+1 == n || path[r+1] == '/'):
			// . element - assume it has to be cleaned.
			return true
		case path[r] == '.' && path[r+1] == '.' && (r+2 == n || path[r+2] == '/'):

## Use Case { #use-case }

Let's start with an example **use case** and then see how to solve it with this.

Let's imagine that you have some **machine learning models** that you want to use to handle requests. 🤖

	for {
		if !globalCallhomeConfig.Enabled() {
			// Stop the processing as callhome got disabled
			return false
		}

		select {
		case <-ctx.Done():
			// indicates that we do not need to run callhome anymore
			return false
		case <-callhomeTimer.C:
			if !globalCallhomeConfig.Enabled() {
				// Stop the processing as callhome got disabled
				return false
			}

			performCallhome(ctx)