* [system DNS service][SYSTEM], which is the default. Some applications may provide their own
 * implementation to use a different DNS server, to prefer IPv6 addresses, to prefer IPv4 addresses,
 * or to force a specific known IP address.
 *
 * Implementations of this interface must be safe for concurrent use.
 */
fun interface Dns {
  /**

Sie sehen die automatische API-Dokumentation für die Unteranwendung, welche nur deren eigene _Pfadoperationen_ anzeigt, alle unter dem korrekten Unterpfad-Präfix `/subapi`:

<img src="/img/tutorial/sub-applications/image02.png">

   * {@code equals}, {@code hashCode} or {@code toString} behavior of the returned function. A
   * future migration to {@code java.util.function} will not preserve this behavior.
   *
   * <p>As discussed above, prefer to use the method reference {@code Object::toString} instead,
   * though note that it is not serializable unless you explicitly make it {@link Serializable},

- Never change punctuation inside inline code, code blocks, URLs, or file paths.

### Ellipsis

- Keep ellipsis style consistent within each document, prefer `...` over  `……`.
- Never change ellipsis in code, URLs, or CLI examples.

### Preferred translations / glossary

Use the following preferred translations when they apply in documentation prose:

- request (HTTP): 请求

///

## Benutzerdefinierte Header { #custom-headers }

Beachten Sie, dass benutzerdefinierte proprietäre Header [mit dem Präfix `X-`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers) hinzugefügt werden können.

pkg log, func Flags() int
pkg log, func New(io.Writer, string, int) *Logger
pkg log, func Panic(...interface{})
pkg log, func Panicf(string, ...interface{})
pkg log, func Panicln(...interface{})
pkg log, func Prefix() string
pkg log, func Print(...interface{})
pkg log, func Printf(string, ...interface{})
pkg log, func Println(...interface{})
pkg log, func SetFlags(int)
pkg log, func SetOutput(io.Writer)

 * create the {@code TopKSelector} instance.
 *
 * <p>If your input data is available as a {@link Stream}, prefer passing {@link
 * Comparators#least(int)} to {@link Stream#collect(java.util.stream.Collector)}. If it is available
 * as an {@link Iterable} or {@link Iterator}, prefer {@link Ordering#leastOf(Iterable, int)}.
 *
 * <p>This uses the same efficient implementation as {@link Ordering#leastOf(Iterable, int)},

   * {@code equals}, {@code hashCode} or {@code toString} behavior of the returned function. A
   * future migration to {@code java.util.function} will not preserve this behavior.
   *
   * <p>As discussed above, prefer to use the method reference {@code Object::toString} instead,
   * though note that it is not serializable unless you explicitly make it {@link Serializable},

{* ../../docs_src/middleware/tutorial001_py310.py hl[8:9,11,14] *}

/// tip | Dica

Tenha em mente que cabeçalhos proprietários personalizados podem ser adicionados [usando o prefixo `X-`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers).

Le code généré contient encore des **informations dupliquées**.

Nous savons déjà que cette méthode est liée aux **items** parce que ce mot figure dans `ItemsService` (issu du tag), mais nous avons encore le nom du tag préfixé dans le nom de la méthode. 😕

Nous voudrons probablement le conserver pour OpenAPI en général, car cela garantira que les operation IDs sont **uniques**.