*
 * <p>The ordering of the row and column keys provided when the table is constructed determines the
 * iteration ordering across rows and columns in the table's views. None of the view iterators
 * support {@link Iterator#remove}. If the table is modified after an iterator is created, the
 * iterator remains valid.
 *

  ): RouteSelector =
    RouteSelector(
      address = address,
      routeDatabase = routeDatabase,
      fastFallback = fastFallback,
      connectionUser = CallConnectionUser(call, ConnectionListener.NONE, newChain(call)),
    )

  private fun newChain(call: RealCall): RealInterceptorChain =
    RealInterceptorChain(
      call = call,
      interceptors = listOf(),
      index = 0,
      exchange = null,

        .build()

    val dohDns = buildCloudflareIp(client)
    val dohEnabledClient =
      client
        .newBuilder()
        .eventListener(EventListener.NONE)
        .dns(dohDns)
        .build()

    dohEnabledClient.get("https://www.twitter.com/robots.txt")
    dohEnabledClient.get("https://www.facebook.com/robots.txt")
  }

  @Test

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}
```

### Dockerfile

Agora, no mesmo diretório do projeto, crie um arquivo `Dockerfile` com:

```{ .dockerfile .annotate }
# (1)
FROM python:3.9

			return nil, err
		}

		// if object doesn't exist and not a replication request return error for If-Match conditional requests
		// If-None-Match should be allowed to proceed for non-existent objects
		if err != nil && !opts.ReplicationRequest && opts.HasIfMatch && (isErrObjectNotFound(err) || isErrVersionNotFound(err)) {
			return nil, err
		}
	}

     */
    protected abstract long makeKey(Request request) throws IOException;

    /**
     * Peek at the next key without removing it from the input stream
     *
     * @return the next key or null if none available
     * @throws IOException if an I/O error occurs
     */
    protected abstract Long peekKey() throws IOException;

    /**
     * Send a request over the transport
     *

    }
    return Iterators.removeIf(removeFrom.iterator(), predicate);
  }

  /** Removes and returns the first matching element, or returns {@code null} if there is none. */
  static <T extends @Nullable Object> @Nullable T removeFirstMatching(
      Iterable<T> removeFrom, Predicate<? super T> predicate) {
    checkNotNull(predicate);
    Iterator<T> iterator = removeFrom.iterator();

	// than failing with UnknownAPIRequest we simply handle it for now.
	apiRouter.Methods(http.MethodGet).Path(SlashSeparator + SlashSeparator).
		HandlerFunc(s3APIMiddleware(api.ListBucketsHandler))

	// If none of the routes match add default error handler routes
	apiRouter.NotFoundHandler = collectAPIStats("notfound", httpTraceAll(errorResponseHandler))

/// tip | Dica

O segundo parâmetro em <a href="https://docs.python.org/3.8/library/os.html#os.getenv" class="external-link" target="_blank">`os.getenv()`</a> é o valor padrão para o retorno.

Se nenhum valor for informado, `None` é utilizado por padrão, aqui definimos `"World"` como o valor padrão a ser utilizado.

///

E depois você pode executar esse arquivo:

<div class="termy">

```console
// Aqui ainda não definimos a env var

nElements:0,_selectedSuggestion:null,_previousTypedVal:null,suggest:function(b,d,e){var f={css:{maxHeight:"150px",background:"#FFF",lineHeight:"150%",textDecoration:"underline",overflowX:"hidden",overflowY:"auto",border:"#CCC solid 1px",borderTop:"none",cursor:"pointer"},activeSuggestionCSS:{background:"#E9E9E9"}},g=function(a,b){var c=b.offset();a.css({width:b.outerWidth(),left:c.left+"px",top:c.top+b.outerHeight()+"px"})};e&&a.extend(f,e),f.css.position="absolute",f.css["z-index"]=9999,b.attr(...