///

```Python
commons = Depends(CommonQueryParams)
```

////

...como en:

{* ../../docs_src/dependencies/tutorial003_an_py310.py hl[19] *}

Pero declarar el tipo es recomendable, ya que de esa manera tu editor sabrá lo que se pasará como el parámetro `commons`, y entonces podrá ayudarte con el autocompletado, chequeo de tipos, etc:

<img src="/img/tutorial/dependencies/image02.png">

    protected @Nullable T computeNext() {
      while (!stack.isEmpty()) {
        PostOrderNode<T> top = stack.getLast();
        if (top.childIterator.hasNext()) {
          T child = top.childIterator.next();
          stack.addLast(expand(child));
        } else {
          stack.removeLast();
          return top.root;
        }
      }
      return endOfData();
    }

        raise


@app.get("/items/{item_id}")
def get_item(item_id: str, username: str = Depends(get_username)):
    if item_id == "portal-gun":
        raise InternalError(
            f"The portal gun is too dangerous to be owned by {username}"
        )
    if item_id != "plumbus":
        raise HTTPException(
            status_code=404, detail="Item not found, there's only a plumbus here"
        )

                        .data(content.getBytes(Constants.CHARSET_UTF_8));
        response.headerContentDispositionInline(); // TODO will be fixed in lastaflute
        return response;
    }

End:" risposta/e",badAlphaNumeric:"Il valore proposto deve contenere caratteri alfanumerici (a-z e 1234...)",badAlphaNumericExtra:"",wrongFileSize:"Il file che si sta cercando di caricare è troppo grande (massimo %s)",wrongFileType:"Solo i file di tipo %s possono essere inviati",groupCheckedRangeStart:"Si prega di scegliere tra ",groupCheckedTooFewStart:"Si prega di selezionare un minimo di ",groupCheckedTooManyStart:"Si prega di selezionare un massimo di ",groupCheckedEnd:" opzione/i",badCreditCard:"Il...

public abstract class AbstractLoadingCache<K, V> extends AbstractCache<K, V>
    implements LoadingCache<K, V> {

  /** Constructor for use by subclasses. */
  protected AbstractLoadingCache() {}

  @CanIgnoreReturnValue // TODO(b/27479612): consider removing this?
  @Override
  public V getUnchecked(K key) {
    try {
      return get(key);
    } catch (ExecutionException e) {
      throw new UncheckedExecutionException(e.getCause());
    }

        raise


@app.get("/items/{item_id}")
def get_item(item_id: str, username: Annotated[str, Depends(get_username)]):
    if item_id == "portal-gun":
        raise InternalError(
            f"The portal gun is too dangerous to be owned by {username}"
        )
    if item_id != "plumbus":
        raise HTTPException(
            status_code=404, detail="Item not found, there's only a plumbus here"
        )

  /** Returns the sample elements that this generate populates its container with. */
  SampleElements<E> samples();

  /**
   * Creates a new container containing the given elements. TODO: would be nice to figure out how to
   * use E... or E[] as a parameter type, but this doesn't seem to work because Java creates an
   * array of the erased type.
   */
  T create(Object... elements);

  /**

    protected final Logger out;

    public Slf4jMavenTransferListener() {
        this.out = LoggerFactory.getLogger(Slf4jMavenTransferListener.class);
    }

    // TODO should we deprecate?
    public Slf4jMavenTransferListener(Logger out) {
        this.out = out;
    }

    @Override
    public void transferInitiated(TransferEvent event) {

Recuerda que cuando importas `Query`, `Path`, y otros desde `fastapi`, en realidad son funciones que devuelven clases especiales.

///

/// tip | Consejo

Observa cómo cada atributo del modelo con un tipo, un valor por defecto y `Field` tiene la misma estructura que un parámetro de una *path operation function*, con `Field` en lugar de `Path`, `Query` y `Body`.

///

## Agregar información extra { #add-extra-information }