constraints.Max.message         = {item} muss kleiner oder gleich {value} sein.
constraints.Min.message         = {item} muss größer oder gleich {value} sein.
constraints.NotNull.message     = {item} darf nicht leer sein.
constraints.Null.message        = {item} muss leer sein.
constraints.Past.message        = {item} muss in der Vergangenheit liegen.
constraints.Pattern.message     = {item} muss dem regulären Ausdruck "{regexp}" entsprechen.

---

Cuando construyes APIs, normalmente usas uno de estos métodos específicos de HTTP para realizar una acción específica.

Normalmente usas:

* `POST`: para crear datos.
* `GET`: para leer datos.
* `PUT`: para actualizar datos.
* `DELETE`: para borrar datos.

Así que en OpenAPI, cada uno de estos métodos de HTTP es referido como una "operación".

Nosotros también los llamaremos "**operación**".

    * Como el parámetro `q` fue declarado con `= None` es opcional.
    * Sin el `None` sería obligatorio (cómo lo es el body en el caso con `PUT`).
* Para requests de tipo `PUT` a `/items/{item_id}` leer el body como JSON:
    * Revisar si tiene un atributo requerido `name` que debe ser un `str`.
    * Revisar si tiene un atributo requerido `price` que debe ser un `float`.

	return deleteBucketLocal(ctx, bucket, opts)
}

// client to talk to peer Nodes.
type remotePeerS3Client struct {
	node  Node
	pools []int

	// Function that returns the grid connection for this peer when initialized.
	// Will return nil if the grid connection is not initialized yet.
	gridConn func() *grid.Connection
}

// S3PeerSys - S3 peer call system.
type S3PeerSys struct {
	peerClients []peerS3Client // Excludes self

	return &peerRESTClient{
		host: peer, restClient: restClient, gridHost: gridHost,
		gridConn: func() *grid.Connection {
			// Lazy initialization of grid connection.
			// When we create this peer client, the grid connection is likely not yet initialized.
			if gridHost == "" {
				bugLogIf(context.Background(), fmt.Errorf("gridHost is empty for peer %s", peer.String()), peer.String()+":gridHost")
				return nil
			}

  }

  private fun connectHttp2(
    peer: MockHttp2Peer,
    realConnection: RealConnection,
    maxConcurrentStreams: Int,
  ): Http2Connection {
    // Write the mocking script.
    val settings1 = Settings()
    settings1[Settings.MAX_CONCURRENT_STREAMS] = maxConcurrentStreams
    peer.sendFrame().settings(settings1)
    peer.acceptFrame() // ACK
    peer.sendFrame().ping(false, 2, 0)

  fun writeTimeout(): Timeout = writeTimeout

  /** Returns a source that reads data from the peer. */
  fun getSource(): Source = source

  /**
   * Returns a sink that can be used to write data to the peer.
   *
   * @throws IllegalStateException if this stream was initiated by the peer and a [writeHeaders] has
   *     not yet been sent.
   */
  fun getSink(): Sink {
    this.withLock {

    // ConnectionPool.
    taskRunner.newQueue().execute(name = connectionName, block = readerRunnable)
  }

  /** Merges [settings] into this peer's settings and sends them to the remote peer. */
  @Throws(IOException::class)
  fun setSettings(settings: Settings) {
    writer.withLock {
      this.withLock {
        if (isShutdown) {
          throw ConnectionShutdownException()

}

// FindGridHostsFromPeerStr will return a matching peer from provided peer (as string)
func (l EndpointServerPools) FindGridHostsFromPeerStr(peer string) (peerGrid string) {
	if peer == "" {
		return ""
	}
	for _, ep := range l {
		for _, endpoint := range ep.Endpoints {
			if endpoint.IsLocal {
				continue
			}

			if endpoint.Host == peer {
				return endpoint.GridHost()
			}
		}
	}

// RXSample holds the RX bytes for the duration between
// the last peer to connect and the first peer to disconnect.
// This is to improve the RX throughput accuracy.
type netPerfRX struct {
	RX                uint64    // RX bytes
	lastToConnect     time.Time // time at which last peer to connect to us
	firstToDisconnect time.Time // time at which the first peer disconnects from us