Using the below example document:
<img width="85%" src="https://bradley.codes/static/img/jstream-levels.gif" alt="jstream"/>

we can choose to extract and act only the objects within the top-level array:
```go
f, _ := os.Open("input.json")
decoder := jstream.NewDecoder(f, 1) // extract JSON values at a depth level of 1

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.plugin;

/**
 * An exception occurring during the execution of a plugin.<br>
 * Throwing this exception causes a "BUILD ERROR" message to be displayed.
 *
 */
public class MojoExecutionException extends AbstractMojoExecutionException {
    /**

*   Fixes a missing validation which causes denial of service via `GetSessionTensor` ([CVE-2022-29191](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-29191))
*   Fixes a missing validation which causes denial of service via `StagePeek` ([CVE-2022-29195](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-29195))

     *
     * @param model The model that could not be built, may be {@code null}.
     * @param modelId The identifier of the model that could not be built, may be {@code null}.
     * @param problems The problems that causes this exception, may be {@code null}.
     * @deprecated Use {@link #ModelBuildingException(ModelBuildingResult)} instead.
     */
    @Deprecated

Dans ce cas, **FastAPI** détectera qu'il y a plus d'un paramètre dans le body (chacun correspondant à un modèle Pydantic).

Il utilisera alors les noms des paramètres comme clés, et s'attendra à recevoir quelque chose de semblable à :

```JSON
{
    "item": {
        "name": "Foo",
        "description": "The pretender",
        "price": 42.0,
        "tax": 3.2
    },
    "user": {
        "username": "dave",

	return json.Marshal(&SrvRecord{
		Host:         ip,
		Port:         json.Number(port),
		TTL:          ttl,
		CreationDate: t,
	})
}

// Close closes the internal etcd client and cannot be used further
func (c *CoreDNS) Close() error {
	c.etcdClient.Close()
	return nil
}

// List - Retrieves list of DNS entries for the domain.
func (c *CoreDNS) List() (map[string][]SrvRecord, error) {

}
```

#### Desembrulhando um `dict` { #unpacking-a-dict }

Se tomarmos um `dict` como `user_dict` e passarmos para uma função (ou classe) com `**user_dict`, o Python irá "desembrulhá-lo". Ele passará as chaves e valores do `user_dict` diretamente como argumentos chave-valor.

Então, continuando com o `user_dict` acima, escrevendo:

```Python
UserInDB(**user_dict)
```

Resultaria em algo equivalente a:

```Python

     * @param count the number of misses to record
     * @since 11.0
     */
    void recordMisses(int count);

    /**
     * Records the successful load of a new entry. This should be called when a cache request causes
     * an entry to be loaded, and the loading completes successfully. In contrast to {@link
     * #recordMisses}, this method should only be called by the loading thread.
     *

   * expression {@code o -> Optional.toJavaUtil(o)} instead.
   *
   * @since 33.4.0 (but since 21.0 in the JRE flavor)
   */
  @SuppressWarnings({
    "AmbiguousMethodReference", // We chose the name despite knowing this risk.
    "NullableOptional", // Null passthrough is reasonable for type conversions
  })
  // If users use this when they shouldn't, we hope that NewApi will catch subsequent Optional calls

 * **Exchange** carries a single HTTP request/response pair.

 * **ExchangeFinder** chooses which connection carries each exchange. Where possible it will use the same connection for all exchanges in a single call. It prefers reusing pooled connections over establishing new connections.      

#### Per-Connection Locks