```Python
some_variable: PlaneItem | CarItem
```

But if we put that in the assignment `response_model=PlaneItem | CarItem` we would get an error, because Python would try to perform an **invalid operation** between `PlaneItem` and `CarItem` instead of interpreting that as a type annotation.

## List of models

The same way, you can declare responses of lists of objects.

	aggFnSum   FuncName = "SUM"
)

var (
	errNonNumericArg = func(fnStr FuncName) error {
		return fmt.Errorf("%s() requires a numeric argument", fnStr)
	}
	errInvalidAggregation = errors.New("Invalid aggregation seen")
)

type aggVal struct {
	runningSum             *Value
	runningCount           int64
	runningMax, runningMin *Value

	// Stores if at least one record has been seen
	seen bool
}

        } catch (final QueryParseException e) {
            throw new InvalidQueryException(messages -> messages.addErrorsInvalidQueryParseError(UserMessages.GLOBAL_PROPERTY_KEY),
                    "Invalid query: " + queryContext.getQueryString(), e);
        }
    }

    protected QueryParser getQueryParser() {
        return ComponentUtil.getQueryParser();
    }

			expectedHeaders:    map[string]string{"X-Amz-Meta-Uuid": "1234"},
			accessKey:          credentials.AccessKey,
			secretKey:          credentials.SecretKey,
			malformedBody:      false,
		},
		// Bad case invalid request.
		{
			objectName:         "test",
			data:               []byte("Hello, World"),
			expectedRespStatus: http.StatusForbidden,
			accessKey:          "",
			secretKey:          "",

        if (url.startsWith("https:") && canonicalUrl.startsWith("http:")) {
            if (logger.isDebugEnabled()) {
                logger.debug("Invalid Canonical Url(https->http): {} -> {}", url, canonicalUrl);
            }
            return false;
        }
        return true;
    }

	return time.Unix(0, x.versions[0].header.ModTime)
}

func (x *xlMetaV2) addVersion(ver xlMetaV2Version) error {
	modTime := ver.getModTime().UnixNano()
	if !ver.Valid() {
		return errors.New("attempted to add invalid version")
	}
	encoded, err := ver.MarshalMsg(nil)
	if err != nil {
		return err
	}

	// returns error if we have exceeded configured object max versions

	kubeconfig := createPluginKubeconfig(caData, clusterName, server, authProviderConfig)
	if err := clientcmd.Validate(*kubeconfig); err != nil {
		return nil, fmt.Errorf("invalid kubeconfig: %v", err)
	}

	// Encode the Kubeconfig in a secret that can be loaded by Istio to dynamically discover and access the remote cluster.
	return createRemoteServiceAccountSecret(kubeconfig, clusterName, secName)

* **Convertir des données** : depuis la requête vers les types requis.
* **Valider des données** : venant de chaque requête :
    * Générant automatiquement des **erreurs** renvoyées au client quand la donnée est invalide.
* **Documenter** l'API avec OpenAPI :
    * ce qui ensuite utilisé par les interfaces utilisateur automatiques de documentation interactive.

    }

    // ===================================================================================
    //                                                                       Invalid Query
    //                                                                       =============
    protected void checkEsInvalidQuery(String name, Object value) {

    }

    // ===================================================================================
    //                                                                       Invalid Query
    //                                                                       =============
    protected void checkEsInvalidQuery(String name, Object value) {