}

  // Wrapper of EnumMultiset factory methods, because we need to skip create(Class).
  // create(Enum1.class) is equal to create(Enum2.class) but testEquals() expects otherwise.
  // For the same reason, we need to skip create(Iterable, Class).
  private static class EnumMultisetFactory {
    @Keep // used reflectively by testEquals
    public static <E extends Enum<E>> EnumMultiset<E> create(Iterable<E> elements) {

     *
     * @return the RID
     */
    int getRid();

    /**
     * Return a String representing this SID ideal for display to
     * users. This method should return the same text that the ACL
     * editor in Windows would display.
     * <p>
     * Specifically, if the SID has
     * been resolved and it is not a domain SID or builtin account,

     */
    public static String toHexString(final byte[] data) {
        return toHexString(data, 0, data.length);
    }

    /**
     * This is the same as {@link jcifs.util.Hexdump#toHexString(int val, int
     * size)} but provides a more practical form when trying to avoid {@link
     * java.lang.String} concatenation and {@link java.lang.StringBuffer}.
     *

    }

    @Test
    void testLoadBalancerAccess() {
        ChannelLoadBalancer balancer = channelManager.getLoadBalancer();
        assertNotNull(balancer);

        // Should return same instance
        assertSame(balancer, channelManager.getLoadBalancer());
    }

    @Test
    void testChannelFailureHandling() throws UnknownHostException {

        CredentialsInternal renewed = impl.renew();

        // Assert: verify behavior based on scenario
        if (expectSame) {
            assertSame(impl, renewed, "renew() should return the same instance");
        } else if (expectNew) {
            assertNotNull(renewed, "renew() should return a new non-null instance");
            assertNotSame(impl, renewed, "renew() should return a different instance");

///

{* ../../docs_src/separate_openapi_schemas/tutorial002_py310.py hl[10] *}

### Mismo Esquema para Modelos de Entrada y Salida en la Documentación { #same-schema-for-input-and-output-models-in-docs }

Y ahora habrá un único esquema para entrada y salida para el modelo, solo `Item`, y tendrá `description` como **no requerido**:

<div class="screenshot">

///

### Non-async *path operation functions* { #non-async-path-operation-functions }

You can also use regular `def` functions (without `async`), and use `yield` the same way.

FastAPI will make sure it's run correctly so that it doesn't block the event loop.

As in this case the function is not async, the right return type would be `Iterable[Item]`:

///

### Non-async *path operation functions* { #non-async-path-operation-functions }

You can also use regular `def` functions (without `async`), and use `yield` the same way.

FastAPI will make sure it's run correctly so that it doesn't block the event loop.

As in this case the function is not async, the right return type would be `Iterable[Item]`:

///

{* ../../docs_src/separate_openapi_schemas/tutorial002_py310.py hl[10] *}

### Mesmo Esquema para Modelos de Entrada e Saída na Documentação { #same-schema-for-input-and-output-models-in-docs }

E agora haverá um único esquema para entrada e saída para o modelo, apenas `Item`, e ele terá `description` como **não obrigatório**:

<div class="screenshot">

query_extractor(["query_extractor"])
query_or_cookie_extractor(["query_or_cookie_extractor"])

read_query["/items/"]

query_extractor --> query_or_cookie_extractor --> read_query
```

## 多次使用同一个依赖项 { #using-the-same-dependency-multiple-times }

如果在同一个*路径操作* 多次声明了同一个依赖项，例如，多个依赖项共用一个子依赖项，**FastAPI** 在处理同一请求时，只调用一次该子依赖项。

FastAPI 不会为同一个请求多次调用同一个依赖项，而是把依赖项的返回值进行<dfn title="用于存储已计算/生成的值，以便复用而无需再次计算的实用工具/系统">「缓存」</dfn>，并把它传递给同一请求中所有需要使用该返回值的「依赖项」。