* [WindowCounter] generally carries the client view of total and acked bytes.
   */
  fun receivingConnectionWindowChanged(windowCounter: WindowCounter)

  /** Noop implementation */
  object None : FlowControlListener {
    override fun receivingStreamWindowChanged(
      streamId: Int,
      windowCounter: WindowCounter,
      bufferSize: Long,
    ) {
    }

                return MinimalSet.of(elements);
              }
            })
        .named("MinimalSet")
        .withFeatures(
            CollectionFeature.ALLOWS_NULL_VALUES, CollectionFeature.NONE, CollectionSize.ANY)
        .createTestSuite();
  }

public interface BeanConfigurationPathTranslator {

    /**
     * Translates the specified path.
     *
     * @param path The path to translate, may be {@code null}.
     * @return The translated path or {@code null} if none.
     */
    File translatePath(File path);

                return MinimalSet.of(elements);
              }
            })
        .named("MinimalSet")
        .withFeatures(
            CollectionFeature.ALLOWS_NULL_VALUES, CollectionFeature.NONE, CollectionSize.ANY)
        .createTestSuite();
  }

public class CIDetectorHelperRunner {
    public static void main(String[] args) {
        List<CIInfo> detect = CIDetectorHelper.detectCI();
        if (detect.isEmpty()) {
            System.out.print("NONE;");
        } else {
            detect.forEach(d -> System.out.print(d.name() + (d.isVerbose() ? "+VERBOSE" : "") + ";"));
        }
    }

```

이는 `item`이 `int` 또는 `str`일 수 있다는 뜻입니다.

#### `None`일 수도 있음 { #possibly-none }

값이 `str` 같은 타입일 수도 있지만, `None`일 수도 있다고 선언할 수 있습니다.

//// tab | Python 3.10+

```Python hl_lines="1"
{!> ../../docs_src/python_types/tutorial009_py310.py!}
```

////

그냥 `str` 대신 `str | None`을 사용하면, 값이 항상 `str`이라고 가정하고 있지만 실제로는 `None`일 수도 있는 상황에서 에디터가 오류를 감지하도록 도와줍니다.

### 타입으로서의 클래스 { #classes-as-types }

import subprocess
import time

import httpx
from playwright.sync_api import Playwright, sync_playwright


# Run playwright codegen to generate the code below, copy paste the sections in run()
def run(playwright: Playwright) -> None:
    browser = playwright.chromium.launch(headless=False)
    # Update the viewport manually
    context = browser.new_context(viewport={"width": 960, "height": 1080})
    page = context.new_page()

import subprocess
import time

import httpx
from playwright.sync_api import Playwright, sync_playwright


# Run playwright codegen to generate the code below, copy paste the sections in run()
def run(playwright: Playwright) -> None:
    browser = playwright.chromium.launch(headless=False)
    # Update the viewport manually
    context = browser.new_context(viewport={"width": 960, "height": 1080})
    page = context.new_page()

    )
    assert result.returncode == 1, result.stdout
    assert "Path does not exist non_existent_file.py" in result.stdout


def test_fastapi_cli_not_installed():
    with patch.object(fastapi.cli, "cli_main", None):
        with pytest.raises(RuntimeError) as exc_info:
            fastapi.cli.main()

        super(msg);
        this.rootCause = rootCause;
    }

    /**
     * Returns the root cause of this exception.
     *
     * @return the root cause or null if none was set
     */
    public Throwable getRootCause() {
        return rootCause;
    }

    @Override
    public String toString() {
        if (rootCause != null) {