*
     * @return the signing key or null if not available
     */
    byte[] getSigningKey();

    /**
     * Validates authentication credentials
     *
     * @return true if credentials are valid
     */
    boolean validateCredentials();

    /**
     * Clears sensitive authentication data
     */
    void clearSensitiveData();

    /**
     * Gets authentication metadata for auditing
     *

    * The generated schema will specify that it's a `str` with `binary` "format".
* `Decimal`:
    * Standard Python `Decimal`.
    * In requests and responses, handled the same as a `float`.
* You can check all the valid Pydantic data types here: [Pydantic data types](https://docs.pydantic.dev/latest/usage/types/types/).

## Example { #example }

Here's an example *path operation* with parameters using some of the above types.

        // Should read nothing (returns 0)
        assertEquals(0, read);
    }

    @Test
    void testMapInformationLevel() {
        // Test valid information levels
        assertEquals(0x0101, Trans2QueryPathInformation.mapInformationLevel(FileInformation.FILE_BASIC_INFO));

{* ../../docs_src/body_nested_models/tutorial005_py310.py hl[2,8] *}

The string will be checked to be a valid URL, and documented in JSON Schema / OpenAPI as such.

## Attributes with lists of submodels { #attributes-with-lists-of-submodels }

You can also use Pydantic models as subtypes of `list`, `set`, etc.:

     * @return The script engine.
     */
    public ScriptEngine getScriptEngine(final String name) {
        if (name == null) {
            throw new ScriptEngineException("Script engine name parameter is null. A valid script engine name must be provided.");
        }
        final ScriptEngine scriptEngine = scriptEngineMap.get(name.toLowerCase(Locale.ROOT));
        if (scriptEngine != null) {
            return scriptEngine;
        }

     * another goal of the same plugin.
     * @return the goal
     */
    @Nonnull
    String goal() default "";

    /**
     * Lifecycle id of the lifecycle that defines {@link #phase()}. Only valid in combination with {@link #phase()}. If
     * not specified, Maven will use the lifecycle of the current build.
     *
     * @see <a href="https://maven.apache.org/maven-plugin-api/lifecycle-mappings.html">Lifecycle Mappings</a>

		1: {bucketName: "------", objName: "obj", inputData: []byte(""), expectedError: BucketNameInvalid{Bucket: "------"}},
		2: {
			bucketName: "$this-is-not-valid-too", objName: "obj", inputData: []byte(""),
			expectedError: BucketNameInvalid{Bucket: "$this-is-not-valid-too"},
		},
		3: {bucketName: "a", objName: "obj", inputData: []byte(""), expectedError: BucketNameInvalid{Bucket: "a"}},

		// Case with invalid object names.

Por defecto, **FastAPI** usa un chequeo estricto del header `Content-Type` para request bodies JSON, esto significa que las requests JSON deben incluir un header `Content-Type` válido (p. ej. `application/json`) para que el request body se parse como JSON.

## Riesgo de CSRF { #csrf-risk }

	for _, rule := range lc.Rules {
		if rule.Transition.StorageClass != "" {
			if valid := globalTierConfigMgr.IsTierValid(rule.Transition.StorageClass); !valid {
				return errInvalidStorageClass
			}
		}
		if rule.NoncurrentVersionTransition.StorageClass != "" {
			if valid := globalTierConfigMgr.IsTierValid(rule.NoncurrentVersionTransition.StorageClass); !valid {
				return errInvalidStorageClass
			}
		}
	}
	return nil
}

```

El parámetro `name` **sigue siendo requerido** (no es *opcional*) porque no tiene un valor por defecto. Aun así, `name` acepta `None` como valor:

```Python
say_hi(name=None)  # Esto funciona, None es válido 🎉
```

La buena noticia es que, en la mayoría de los casos, podrás simplemente usar `|` para definir uniones de tipos:

```python
def say_hi(name: str | None):
    print(f"Hey {name}!")
```