return nil, err
	}
	return etag, nil
}

// Parse parses s as an S3 ETag, returning the result.
// The string can be an encrypted, singlepart
// or multipart S3 ETag. It returns an error if s is
// not a valid textual representation of an ETag.
func Parse(s string) (ETag, error) {
	const strict = false
	return parse(s, strict)
}

// parse parse s as an S3 ETag, returning the result.
// It operates in one of two modes:

* Action required: federation-only: Please update your cluster name to be a valid DNS label. ([#30956](https://github.com/kubernetes/kubernetes/pull/30956), [@nikhiljindal](https://github.com/nikhiljindal))
    * Updating federation.v1beta1.Cluster API to disallow subdomains as valid cluster names. Only DNS labels are allowed as valid cluster names now.

```

</div>

Luego dirígete a la interfaz de `/docs`, verás que **FastAPI** está usando estos **modelos** para **documentar** la API, y los usará para **serializar** y **validar** los datos también.

<div class="screenshot">
<img src="/img/tutorial/sql-databases/image01.png">
</div>

## Actualizar la App con Múltiples Modelos { #update-the-app-with-multiple-models }

        // When
        int bytesWritten = response.writeBytesWireFormat(buffer, offset);

        // Then
        assertEquals(0, bytesWritten);
    }

    @Test
    @DisplayName("Should read valid single notification from wire format")
    void testReadSingleNotification() throws Exception {
        // Given
        byte[] buffer = new byte[512];
        int offset = 0;

    @ValueSource(strings = { "\\\\server\\share", "\\\\192.168.1.1\\share", "\\\\server.domain.com\\share", "\\\\server\\share\\subfolder",
            "\\\\s\\s" // Minimum path
    })
    @DisplayName("Should handle various valid path formats")
    void testVariousPathFormats(String path) throws Exception {
        // Given
        Smb2TreeConnectRequest req = new Smb2TreeConnectRequest(mockConfig, path);
        byte[] buffer = new byte[1024];

		if i > 0 {
			name, value = name[:i], name[i+1:]
		}
		tokens := Tokenize(name)
		if len(tokens) != 1 || tokens[0].ScanToken != scanner.Ident {
			fmt.Fprintf(os.Stderr, "asm: parsing -D: %q is not a valid identifier name\n", tokens[0])
			flags.Usage()
		}
		macros[name] = &Macro{
			name:   name,
			args:   nil,
			tokens: Tokenize(value),
		}
	}
	return macros
}

        || validSurrogatePairAt(b, b.length() - s - 1)) {
      s--;
    }
    return a.subSequence(a.length() - s, a.length()).toString();
  }

  /**
   * True when a valid surrogate pair starts at the given {@code index} in the given {@code string}.
   * Out-of-range indexes return false.
   */
  @VisibleForTesting
  static boolean validSurrogatePairAt(CharSequence string, int index) {

    private static final long serialVersionUID = 0;
  }

  /**
   * Creates a {@code HashCode} from a hexadecimal ({@code base 16}) encoded string. The string must
   * be at least 2 characters long, and contain only valid, lower-cased hexadecimal characters.
   *
   * <p>This method accepts the exact format generated by {@link #toString}. If you require more

	//
	// This flag should only be set if the user intends to encode a non-portable
	// ZIP file for a specific localized region. Otherwise, the Writer
	// automatically sets the ZIP format's UTF-8 flag for valid UTF-8 strings.
	NonUTF8 bool

	CreatorVersion uint16
	ReaderVersion  uint16
	Flags          uint16

	// Method is the compression method. If zero, Store is used.
	Method uint16

Después, 🤖 toma la primera tarea que termine (digamos, nuestro "archivo-lento" 📝) y continúa con lo que tenía que hacer con ella.

Ese "esperar otra cosa" normalmente se refiere a las operaciones de <abbr title="Input and Output - Entrada y salida">I/O</abbr> que son relativamente "lentas" (comparadas con la velocidad del procesador y la memoria RAM), como esperar:

* que los datos del cliente se envíen a través de la red