dataUsageCacheVerV4      = 4
	dataUsageCacheVerV3      = 3
	dataUsageCacheVerV2      = 2
	dataUsageCacheVerV1      = 1
)

// serialize the contents of the cache.
func (d *dataUsageCache) serializeTo(dst io.Writer) error {
	// Add version and compress.
	_, err := dst.Write([]byte{dataUsageCacheVerCurrent})
	if err != nil {
		return err
	}
	enc, err := zstd.NewWriter(dst,
		zstd.WithEncoderLevel(zstd.SpeedFastest),

            </execution>
            <execution>
              <id>standard</id>
              <goals>
                <goal>java</goal>
                <goal>xpp3-reader</goal>
                <goal>xpp3-writer</goal>
              </goals>
            </execution>
          </executions>
        </plugin>
        <plugin>
          <groupId>org.apache.felix</groupId>

def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}
```

<details markdown="1">
<summary>Or use <code>async def</code>...</summary>

If your code uses `async` / `await`, use `async def`:

```Python hl_lines="9  14"
from typing import Union

from fastapi import FastAPI

app = FastAPI()


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

		t.Fatalf("Initializing config.json failed")
	}

	objectName := `\../.minio.sys/config/hello.txt`

	// initialize HTTP NewRecorder, this records any mutations to response writer inside the handler.
	rec := httptest.NewRecorder()
	// construct HTTP request for Get Object end point.
	req, err := newTestSignedRequestV4(http.MethodPut, getPutObjectURL("", bucketName, objectName),

아무 문제 없습니다. **FastAPI**는 무엇을 할지 알고 있습니다.

/// note | 참고

잘 모르시겠다면, [Async: *"In a hurry?"*](../../async.md){.internal-link target=_blank} 문서에서 `async`와 `await`에 대해 확인할 수 있습니다.

///

## OpenAPI와 통합

모든 요청 선언, 검증과 의존성(및 하위 의존성)에 대한 요구 사항은 동일한 OpenAPI 스키마에 통합됩니다.

따라서 대화형 문서에 이러한 의존성에 대한 모든 정보 역시 포함하고 있습니다:

                SimplexTransferListener simplex = new SimplexTransferListener(new ConsoleMavenTransferListener(
                        context.invokerRequest.messageBuilderFactory(),
                        context.terminal.writer(),
                        context.invokerRequest.effectiveVerbose()));
                context.closeables.add(simplex);
                context.simplexTransferListener = simplex;
            }

			sys:     nil,
		})
		if zerr != nil {
			adminLogIf(ctx, zerr)
			return nil
		}
		header.Method = zip.Deflate
		zwriter, zerr := zipWriter.CreateHeader(header)
		if zerr != nil {
			adminLogIf(ctx, zerr)
			return nil
		}
		if _, err := io.Copy(zwriter, r); err != nil {
			adminLogIf(ctx, err)
		}
		return nil
	}

	for _, f := range iamExportFiles {

			})
			if zerr != nil {
				adminLogIf(ctx, zerr)
				return nil
			}
			header.Method = zip.Deflate
			zwriter, zerr := zipWriter.CreateHeader(header)
			if zerr != nil {
				adminLogIf(ctx, zerr)
				return nil
			}
			if _, err := io.Copy(zwriter, r); err != nil {
				adminLogIf(ctx, err)
			}
			return nil
		}
		for _, f := range iamExportFiles {

			err = dc.Skip()
			if err != nil {
				err = msgp.WrapError(err)
				return
			}
		}
	}
	return
}

// EncodeMsg implements msgp.Encodable
func (z *healingTracker) EncodeMsg(en *msgp.Writer) (err error) {
	// map header, size 29
	// write "ID"
	err = en.Append(0xde, 0x0, 0x1d, 0xa2, 0x49, 0x44)
	if err != nil {
		return
	}
	err = en.WriteString(z.ID)
	if err != nil {

        // Test implementation
    }
    
    public boolean waitForNotification(long timeoutMs) throws InterruptedException {
        return latch.await(timeoutMs, TimeUnit.MILLISECONDS);
    }
    
    public boolean isNotificationReceived() {
        return notificationReceived;
    }
}
```

## 8. Error Handling and Reliability