...et **FastAPI** utilise ces mêmes déclarations pour :

* **Définir les prérequis** : depuis les paramètres de chemins des requêtes, les entêtes, les corps, les dépendances, etc.
* **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 :

	createCmd.PersistentFlags().StringSliceVarP(&resourceLabels, "labels", "l", nil, "The labels to apply to the workload instances; e.g. -l env=prod,vers=2")
	createCmd.PersistentFlags().StringSliceVarP(&annotations, "annotations", "a", nil, "The annotations to apply to the workload instances")

// target non-resource URL. A NonResourcePolicyRule matches a request if and only if both (a) at least one member
// of verbs matches the request and (b) at least one member of nonResourceURLs matches the request.
message NonResourcePolicyRule {
  // `verbs` is a list of matching verbs and may not be empty.
  // "*" matches all verbs. If it is present, it must be the only entry.

  // +optional
  optional string path = 1;

  // Verb is the standard HTTP verb
  // +optional
  optional string verb = 2;
}

// NonResourceRule holds information that describes a rule for the non-resource
message NonResourceRule {
  // Verb is a list of kubernetes non-resource API verbs, like: get, post, put, delete, patch, head, options.  "*" means all.
  repeated string verbs = 1;

  // +optional
  optional string path = 1;

  // Verb is the standard HTTP verb
  // +optional
  optional string verb = 2;
}

// NonResourceRule holds information that describes a rule for the non-resource
message NonResourceRule {
  // Verb is a list of kubernetes non-resource API verbs, like: get, post, put, delete, patch, head, options.  "*" means all.
  repeated string verbs = 1;

// target non-resource URL. A NonResourcePolicyRule matches a request if and only if both (a) at least one member
// of verbs matches the request and (b) at least one member of nonResourceURLs matches the request.
message NonResourcePolicyRule {
  // `verbs` is a list of matching verbs and may not be empty.
  // "*" matches all verbs. If it is present, it must be the only entry.

// target non-resource URL. A NonResourcePolicyRule matches a request if and only if both (a) at least one member
// of verbs matches the request and (b) at least one member of nonResourceURLs matches the request.
message NonResourcePolicyRule {
  // `verbs` is a list of matching verbs and may not be empty.
  // "*" matches all verbs. If it is present, it must be the only entry.

	ctx := r.Context()

	objectAPI, _ := validateAdminReq(ctx, w, r, policy.ConfigUpdateAdminAction)
	if objectAPI == nil {
		return
	}

	vars := mux.Vars(r)

	subSys := vars["subSys"]
	key := vars["key"]

	_, envOnly := r.Form["env"]

	rd, err := GetHelp(subSys, key, envOnly)
	if err != nil {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return

// target non-resource URL. A NonResourcePolicyRule matches a request if and only if both (a) at least one member
// of verbs matches the request and (b) at least one member of nonResourceURLs matches the request.
message NonResourcePolicyRule {
  // `verbs` is a list of matching verbs and may not be empty.
  // "*" matches all verbs. If it is present, it must be the only entry.

  // verbs is a list of supported API operation types (this includes
  // but is not limited to get, list, watch, create, update, patch,
  // delete, deletecollection, and proxy). Subresources may define
  // custom verbs outside the standard Kubernetes verb set. Clients
  // should expect the behavior of standard verbs to align with
  // Kubernetes interaction conventions.