* other SMB clients (including other threads making calls into jCIFS)
     * will not be permitted to access the target file and will receive "The
     * file is being accessed by another process" message.
     */
    int FILE_NO_SHARE = 0x00;
    /**
     * When specified as the <code>shareAccess</code> constructor parameter,

        CronExpression.class.isAnnotation();
        assertTrue(CronExpression.class.isAnnotation());

        // Check that annotation can be applied to METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER
        java.lang.annotation.Target target = CronExpression.class.getAnnotation(java.lang.annotation.Target.class);
        assertNotNull(target);

        java.lang.annotation.ElementType[] types = target.value();

            digest.sign(dst, headerStart, length, this, response);
        }

        return length;
    }

    /*
     * We overload this because we want readAndXWireFormat to
     * read the parameter words and bytes. This is so when
     * commands are batched together we can recursivly call
     * readAndXWireFormat without reading the non-existent header.
     */

    @Override

          // TODO(cgdecker): Should check for a generic parameter type and error out
          Class<?>[] parameterTypes = method.getParameterTypes();
          checkArgument(
              parameterTypes.length == 1,
              "Method %s has @Subscribe annotation but has %s parameters. "
                  + "Subscriber methods must have exactly 1 parameter.",
              method,
              parameterTypes.length);

As an example, let's take this function:

{* ../../docs_src/python_types/tutorial009c.py hl[1,4] *}

The parameter `name` is defined as `Optional[str]`, but it is **not optional**, you cannot call the function without the parameter:

```Python
say_hi()  # Oh, no, this throws an error! 😱
```

The `name` parameter is **still required** (not *optional*) because it doesn't have a default value. Still, `name` accepts `None` as the value:

## Usando `BackgroundTasks`

Primeiro, importe `BackgroundTasks` e defina um parâmetro em sua _função de operação de caminho_ com uma declaração de tipo de `BackgroundTasks`:

{* ../../docs_src/background_tasks/tutorial001.py hl[1,13] *}

O **FastAPI** criará o objeto do tipo `BackgroundTasks` para você e o passará como esse parâmetro.

## Criar uma função de tarefa

Crie uma função a ser executada como tarefa em segundo plano.

/**
 * An interface for representing and manipulating an origin node's adjacent nodes and incident edges
 * in a {@link Network}.
 *
 * @author James Sexton
 * @param <N> Node parameter type
 * @param <E> Edge parameter type
 */
interface NetworkConnections<N, E> {

  Set<N> adjacentNodes();

  Set<N> predecessors();

  Set<N> successors();

  Set<E> incidentEdges();

  Set<E> inEdges();

import java.util.Set;
import org.jspecify.annotations.Nullable;

/**
 * A base implementation of {@link NetworkConnections} for undirected networks.
 *
 * @author James Sexton
 * @param <N> Node parameter type
 * @param <E> Edge parameter type
 */
abstract class AbstractUndirectedNetworkConnections<N, E> implements NetworkConnections<N, E> {
  /** Keys are edges incident to the origin node, values are the node at the other end. */

Dann können Sie `Field` mit Modellattributen deklarieren:

{* ../../docs_src/body_fields/tutorial001_an_py310.py hl[11:14] *}

`Field` funktioniert genauso wie `Query`, `Path` und `Body`, es hat die gleichen Parameter, usw.

/// note | Technische Details

Nós também declaramos um parâmetro especial do tipo `SecurityScopes`, importado de `fastapi.security`.

A classe `SecurityScopes` é semelhante à classe `Request` (`Request` foi utilizada para obter o objeto da requisição diretamente).

{* ../../docs_src/security/tutorial005_an_py310.py hl[9,106] *}

## Utilize os `scopes`

O parâmetro `security_scopes` será do tipo `SecurityScopes`.