"""
        ),
    ] = None,
) -> bytes:
    """Build SSE wire-format bytes from **pre-serialized** data.

    The result always ends with `\n\n` (the event terminator).
    """
    lines: list[str] = []

    if comment is not None:
        for line in comment.splitlines():
            lines.append(f": {line}")

    if event is not None:

    void readEntries(ObjectInputStream in) throws IOException, ClassNotFoundException {
      while (true) {
        K key = (K) in.readObject();
        if (key == null) {
          break; // terminator
        }
        V value = (V) in.readObject();
        delegate.put(key, value);
      }
    }
  }

  /**

    void readEntries(ObjectInputStream in) throws IOException, ClassNotFoundException {
      while (true) {
        K key = (K) in.readObject();
        if (key == null) {
          break; // terminator
        }
        V value = (V) in.readObject();
        delegate.put(key, value);
      }
    }
  }

  /**

    } finally {
      if (t.getState() != Thread.State.TERMINATED) {
        t.interrupt();
        fail("Test timed out");
      }
    }
  }

  /**
   * Waits for LONG_DELAY_MS milliseconds for the thread to terminate (using {@link
   * Thread#join(long)}), else interrupts the thread (in the hope that it may terminate later) and
   * fails.
   */
  final void awaitTermination(Thread t) {

    } finally {
      if (t.getState() != Thread.State.TERMINATED) {
        t.interrupt();
        fail("Test timed out");
      }
    }
  }

  /**
   * Waits for LONG_DELAY_MS milliseconds for the thread to terminate (using {@link
   * Thread#join(long)}), else interrupts the thread (in the hope that it may terminate later) and
   * fails.
   */
  final void awaitTermination(Thread t) {

   *   <li>awaits executor service termination for half of the specified timeout.
   *   <li>if the timeout expires, it calls {@link ExecutorService#shutdownNow()}, cancelling
   *       pending tasks and interrupting running tasks.
   *   <li>awaits executor service termination for the other half of the specified timeout.
   * </ol>
   *

     * State#FAILED fail}/{@linkplain State#TERMINATED terminate} before all other services have
     * started {@linkplain State#RUNNING running} then this method will not be called.
     */
    public void healthy() {}

    /**
     * Called when the all of the component services have reached a terminal state, either
     * {@linkplain State#TERMINATED terminated} or {@linkplain State#FAILED failed}.
     */

   *
   * <p>Like {@link BufferedReader#readLine()}, this method considers a line to be a sequence of
   * text that is terminated by (but does not include) one of {@code \r\n}, {@code \r} or {@code
   * \n}. If the source's content does not end in a line termination sequence, it is treated as if
   * it does.
   *
   * <p>The caller is responsible for ensuring that the returned stream is closed. For example:
   *

            fail(); // Time Out
        }

        logger.info("Crawler is running");
        count = 0;
        isRunning = true;
        sleepTime = 100; // Reset to 100ms for termination wait

        // Wait until the crawler terminates (with exponential backoff)
        while (count < 3000 && isRunning) {
            ThreadUtil.sleep(sleepTime);
            count++;

A primeira parte da função, antes do `yield`, será executada **antes** de a aplicação iniciar.

E a parte posterior ao `yield` será executada **depois** de a aplicação ter terminado.

### Gerenciador de contexto assíncrono { #async-context-manager }

Se você verificar, a função está decorada com um `@asynccontextmanager`.