protected ByteSink() {}

  /**
   * Returns a {@link CharSink} view of this {@code ByteSink} that writes characters to this sink as
   * bytes encoded with the given {@link Charset charset}.
   */
  public CharSink asCharSink(Charset charset) {
    return new AsCharSink(charset);
  }

  /**
   * Opens a new {@link OutputStream} for writing to this sink. This method returns a new,
   * independent stream each time it is called.

      if (testerSuite.countTestCases() > 0) {
        suite.addTest(testerSuite);
      }
    }
    return suite;
  }

  /** Throw {@link IllegalStateException} if {@link #createTestSuite()} can't be called yet. */
  protected void checkCanCreate() {
    if (subjectGenerator == null) {
      throw new IllegalStateException("Call using() before createTestSuite().");
    }

Você também pode declarar respostas adicionais, com seus modelos, códigos de status, etc.

Existe um capítulo inteiro da nossa documentação sobre isso, você pode ler em [Retornos Adicionais no OpenAPI](additional-responses.md){.internal-link target=_blank}.

## Extras do OpenAPI

Quando você declara uma *operação de rota* na sua aplicação, o **FastAPI** irá gerar os metadados relevantes da *operação de rota* automaticamente para serem incluídos no esquema do OpenAPI.

import java.util.concurrent.Future;
import org.jspecify.annotations.Nullable;

/**
 * A callback for accepting the results of a {@link java.util.concurrent.Future} computation
 * asynchronously.
 *
 * <p>To attach to a {@link ListenableFuture} use {@link Futures#addCallback}.
 *
 * @author Anthony Zana
 * @since 10.0
 */
@GwtCompatible
public interface FutureCallback<V extends @Nullable Object> {

* <a href="https://www.starlette.io/" class="external-link" target="_blank">Starlette</a> for the web parts.
* <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> for the data parts.

## Installation { #installation }

Create and activate a <a href="https://fastapi.tiangolo.com/virtual-environments/" class="external-link" target="_blank">virtual environment</a> and then install FastAPI:

   * System#getProperty(String)}.
   *
   * <p>The value returned by this method is non-null except in rare circumstances:
   *
   * <ul>
   *   <li>{@link #JAVA_EXT_DIRS} was deprecated in Java 8 and removed in Java 9. We have not
   *       confirmed whether it is available under older versions.

     * <p>
     * The list of {@link CoreExtensions} if present, is in precedence order.
     *
     * @return an {@link Optional} containing the {@link CoreExtensions}, or empty if not configured
     */
    @Nonnull
    Optional<List<CoreExtensions>> coreExtensions();

    /**
     * Returns detected CI system, if any.
     *

# ✅ 🇨🇻 - 🏺, ✳, 🎏

👆 💪 🗻 🇨🇻 🈸 👆 👀 ⏮️ [🎧 🈸 - 🗻](sub-applications.md){.internal-link target=_blank}, [⛅ 🗳](behind-a-proxy.md){.internal-link target=_blank}.

👈, 👆 💪 ⚙️ `WSGIMiddleware` & ⚙️ ⚫️ 🎁 👆 🇨🇻 🈸, 🖼, 🏺, ✳, ♒️.

## ⚙️ `WSGIMiddleware`

👆 💪 🗄 `WSGIMiddleware`.

⤴️ 🎁 🇨🇻 (✅ 🏺) 📱 ⏮️ 🛠️.

& ⤴️ 🗻 👈 🔽 ➡.

{* ../../docs_src/wsgi/tutorial001.py hl[2:3,22] *}

## ✅ ⚫️

 *       </ul>
 *   </li>
 * </ul>
 *
 * <p>Fields:
 * <ul>
 *   <li>{@link #client}: The client used to perform analysis.</li>
 *   <li>{@link #settings}: The settings for suggestions.</li>
 *   <li>{@link #analyzerSettings}: The settings for the analyzer.</li>
 *   <li>{@link #transliterator}: The transliterator used to convert between Hiragana and Katakana.</li>
 * </ul>
 */

   * value that are {@linkplain Range#isConnected connected} to this range.
   *
   * <p>The behavior of {@link #get(Comparable) get(k)} after calling this method is identical to
   * the behavior described in {@link #put(Range, Object) put(range, value)}, however the ranges
   * returned from {@link #asMapOfRanges} will be different if there were existing entries which
   * connect to the given range and value.
   *