funcionalidades necessárias em sistemas de API é a "<dfn title="também chamado: marshalling, conversão">serialização</dfn>" de dados, que é pegar dados do código (Python) e convertê-los em algo que possa ser enviado pela rede. Por exemplo, converter um objeto contendo dados de um banco de dados em um objeto JSON. Converter objetos `datetime` em strings, etc.

Outra grande funcionalidade necessária pelas APIs é a validação de dados, garantindo que os dados são válidos, dados certos parâmetros. Por exemplo,...

### API Change

// to populate new values upon cache invalidation.
func (g *MetricsGroupV2) RegisterRead(read func(context.Context) []MetricV2) {
	g.metricsCache = cachevalue.NewFromFunc(g.cacheInterval,
		cachevalue.Opts{ReturnLastGood: true},
		func(ctx context.Context) ([]MetricV2, error) {
			if g.metricsGroupOpts.dependGlobalObjectAPI {
				objLayer := newObjectLayerFn()
				// Service not initialized yet

   * Collections2#transform} or {@link Iterables#transform}.
   *
   * <p><b>Note:</b> serializing the returned list is implemented by serializing {@code fromList},
   * its contents, and {@code function} -- <i>not</i> by serializing the transformed values. This
   * can lead to surprising behavior, so serializing the returned list is <b>not recommended</b>.

supported prefixed version if needed\n  const prefixedProperty = getSupportedPropertyName('transform');\n\n  // now, let's make a step back and look at this code closely (wtf?)\n  // If the content of the popper grows once it's been positioned, it\n  // may happen that the popper gets misplaced because of the new content\n  // overflowing its reference element\n  // To avoid this problem, we provide two options (x and y), which allow\n  // the consumer to define the offset origin.\n  // If we position...

    assertThat(hpackReader!!.getAndResetHeaderList()).isEqualTo(headerBlock)
  }

  /**
   * HPACK has a max header table size, which can be smaller than the max header message. Ensure the
   * larger header content is not lost.
   */
  @Test
  fun tooLargeToHPackIsStillEmitted() {
    bytesIn.writeByte(0x21) // Dynamic table size update (size = 1).
    bytesIn.writeByte(0x00) // Literal indexed

labels.parameters=Parameter
labels.designFile=Hochzuladende Datei
labels.bulkFile=Bulk-Datei
labels.appendQueryParameter=Suchparameter anhängen
labels.configId=Konfigurations-ID
labels.configParameter=Konfigurationsparameter
labels.content=Inhalt
labels.csvFileEncoding=CSV-Kodierung
labels.defaultLabelValue=Standard-Label
labels.designFileName=Dateiname
labels.incrementalCrawling=Letzte Änderung prüfen
labels.errorCount=Fehleranzahl

TFE_Op* CloneOp(const TFE_Op* other) {
  TF_Status* status = TF_NewStatus();
  TFE_Context* context = TFE_OpGetContext(other, status);
  CHECK_EQ(TF_OK, TF_GetCode(status)) << TF_Message(status);
  const char* op_name = TFE_OpGetName(other, status);
  CHECK_EQ(TF_OK, TF_GetCode(status)) << TF_Message(status);
  TFE_Op* ret = TFE_NewOp(context, op_name, status);
  CHECK_EQ(TF_OK, TF_GetCode(status)) << TF_Message(status);

// Cache will be bypassed.
// Context cancellation will be respected but may take a while to effectuate.
func listPathRaw(ctx context.Context, opts listPathRawOptions) (err error) {
	disks := opts.disks
	if len(disks) == 0 {
		return fmt.Errorf("listPathRaw: 0 drives provided")
	}

	// Cancel upstream if we finish before we expect.
	ctx, cancel := context.WithCancel(ctx)
	defer cancel()

			}

			// If context was canceled
			if errors.Is(err, context.Canceled) {
				logger.FatalIf(err, "Server startup canceled upon user request")
			}

			bootLogIf(GlobalContext, err)
		}

		if !globalServerCtxt.StrictS3Compat {