// Prefer the heavier "MapRetrievalCache" for nodes if lookup is expensive.
    this.nodeConnections =
        (nodeConnections instanceof TreeMap)
            ? new MapRetrievalCache<>(nodeConnections)
            : new MapIteratorCache<>(nodeConnections);
    this.edgeCount = checkNonNegative(edgeCount);
  }

  @Override
  public Set<N> nodes() {
    return nodeConnections.unmodifiableKeySet();
  }

    client ->> dep_req: Start request
    Note over dep_req: Run code up to yield
    dep_req ->> dep_func: Pass dependency
    Note over dep_func: Run code up to yield
    dep_func ->> operation: Run path operation with dependency
    operation ->> dep_func: Return from path operation
    Note over dep_func: Run code after yield
    Note over dep_func: ✅ Dependency closed

<img src="/img/tutorial/response-status-code/image01.png">

/// note | Hinweis

Einige Responsecodes (siehe nächsten Abschnitt) kennzeichnen, dass die Response keinen Body hat.

FastAPI erkennt dies und erstellt eine OpenAPI-Dokumentation, die zeigt, dass es keinen Responsebody gibt.

///

## Über HTTP-Statuscodes { #about-http-status-codes }

/// note | Hinweis

<img src="/img/tutorial/response-status-code/image01.png">

/// note | Remarque

Certains codes de réponse (voir la section suivante) indiquent que la réponse n'a pas de corps.

FastAPI le sait et produira une documentation OpenAPI indiquant qu'il n'y a pas de corps de réponse.

///

## À propos des codes d'état HTTP { #about-http-status-codes }

/// note | Remarque

<img src="/img/tutorial/response-status-code/image01.png">

/// note | Примечание

Некоторые коды статуса ответа (см. следующий раздел) указывают на то, что ответ не имеет тела.

FastAPI знает об этом и создаст документацию OpenAPI, в которой будет указано, что тело ответа отсутствует.

///

## Об HTTP статус-кодах { #about-http-status-codes }

/// note | Примечание

            parent.appendChild(caution);
            Element para = document.createElement("para");
            caution.appendChild(para);
            para.appendChild(document.createTextNode(String.format("Note: This %s is ", type)));
            Element link = document.createElement("ulink");
            para.appendChild(link);
            link.setAttribute("url", "../userguide/feature_lifecycle.html");

  @Test
  public void immutableValueGraphBuilder_addNode() {
    ImmutableValueGraph<String, Integer> graph =
        ValueGraphBuilder.directed().<String, Integer>immutable().addNode("A").build();

    assertThat(graph.nodes()).containsExactly("A");
    assertThat(graph.edges()).isEmpty();
  }

  @Test
  public void immutableValueGraphBuilder_putEdgeFromNodes() {
    ImmutableValueGraph<String, Integer> graph =

     *
     * @param tree "dirty" tree root
     * @param versionedVertices true if graph nodes should be versioned (different versions -> different nodes)
     * @param scopedVertices true if graph nodes should be versioned and scoped
     * (different versions and/or scopes -> different nodes)
     *
     */
    public MetadataGraph(MetadataTreeNode tree, boolean versionedVertices, boolean scopedVertices)

            result.addErrorArtifactException(e);
        }

        Set<ResolutionNode> set = new LinkedHashSet<>();

        for (List<ResolutionNode> nodes : resolvedArtifacts.values()) {
            for (ResolutionNode node : nodes) {
                if (!node.equals(root) && node.isActive()) {
                    Artifact artifact = node.getArtifact();

                    try {

<img src="/img/tutorial/response-status-code/image01.png">

/// note | Nota

Algunos códigos de response (ver la siguiente sección) indican que el response no tiene un body.

FastAPI sabe esto, y producirá documentación OpenAPI que establece que no hay un response body.

///

## Acerca de los códigos de estado HTTP { #about-http-status-codes }

/// note | Nota