```Python
item: Item
```

...and with that single declaration you get:

* Editor support, including:
    * Completion.
    * Type checks.
* Validation of data:
    * Automatic and clear errors when the data is invalid.
    * Validation even for deeply nested JSON objects.

    public static boolean isDotQuadIP ( String hostname ) {
        if ( Character.isDigit(hostname.charAt(0)) ) {
            int i, len, dots;
            char[] data;

            i = dots = 0; /* quick IP address validation */
            len = hostname.length();
            data = hostname.toCharArray();
            while ( i < len && Character.isDigit(data[ i++ ]) ) {
                if ( i == len && dots == 3 ) {

O **JSON Schema** na verdade não tem um campo `example` nos padrões. Versões recentes do JSON Schema definem um campo <a href="https://json-schema.org/draft/2019-09/json-schema-validation.html#rfc.section.9.5" class="external-link" target="_blank">`examples`</a>, mas o OpenAPI 3.0.3 é baseado numa versão mais antiga do JSON Schema que não tinha `examples`.

		}
		if err != nil {
			if tc.err == nil {
				t.Fatalf("Test %d: failed due to %v", i+1, err)
			}
		} else {
			if err := v.Validate(); tc.err != err {
				t.Fatalf("Test %d: validation failed due to %v", i+1, err)
			}
			if len(tc.excludedPrefixes) > 0 {
				var mismatch bool
				if len(v.ExcludedPrefixes) != len(tc.excludedPrefixes) {

Cela vous donne beaucoup de flexibilité. Vous pouvez retourner n'importe quel type de données, surcharger n'importe quelle déclaration ou validation de données.

## Utiliser le `jsonable_encoder` dans une `Response`

import org.dbflute.optional.OptionalThing;
import org.lastaflute.web.Execute;
import org.lastaflute.web.login.exception.LoginFailureException;
import org.lastaflute.web.response.HtmlResponse;
import org.lastaflute.web.validation.VaErrorHook;

import jakarta.annotation.Resource;
import jakarta.servlet.http.HttpSession;

public class LoginAction extends FessLoginAction {

				pi.ProxyGID = c.SecurityContext.RunAsGroup
			}
		}
	}
	return pi
}

// containers fetches all containers in the pod.
// This is used to extract init containers (istio-init and istio-validation), and the sidecar.
// The sidecar can be a normal container or init in Kubernetes 1.28+
func containers(pod *v1.Pod) []v1.Container {
	res := make([]v1.Container, 0, len(pod.Spec.Containers)+len(pod.Spec.InitContainers))

                            "content": {"application/json": {"schema": {}}},
                        },
                        "422": {
                            "description": "Validation Error",
                            "content": {
                                "application/json": {
                                    "schema": {

... et avec cette déclaration unique, vous obtenez :

* Une assistance dans votre IDE, notamment :
    * la complétion.
    * la vérification des types.
* La validation des données :
    * des erreurs automatiques et claires lorsque les données ne sont pas valides.
    * une validation même pour les objets <abbr title="JavaScript Object Notation">JSON</abbr> profondément imbriqués.

import org.lastaflute.web.Execute;
import org.lastaflute.web.response.HtmlResponse;
import org.lastaflute.web.response.render.RenderData;
import org.lastaflute.web.ruts.process.ActionRuntime;
import org.lastaflute.web.validation.VaMessenger;
import org.opensearch.index.query.QueryBuilder;
import org.opensearch.index.query.QueryBuilders;

import jakarta.annotation.Resource;
import jakarta.servlet.http.HttpServletRequest;

/**