/// info

重點在於你的應用能夠逐行產生資料，同時用戶端在消耗前一行的資料。

///

/// note | 技術細節

由於每個 JSON 物件會以換行分隔，它們的內容中不能包含實際的換行字元，但可以包含跳脫後的換行（`\n`），這是 JSON 標準的一部分。

不過通常你不需要為此煩惱，這些都會自動處理，繼續往下看吧。🤓

///

## 使用情境 { #use-cases }

你可以用這種方式從 **AI LLM** 服務、**日誌**或**遙測**串流資料，或任何能以 **JSON** 項目結構化的其他型態資料。

/// tip

如果你想串流二進位資料，例如影像或音訊，請參考進階指南：[串流資料](../advanced/stream-data.md)。

///

	object := ""
	uploadID := ""
	if len(params) >= 1 {
		bucket = params[0]
	}
	if len(params) == 2 {
		object = params[1]
	}
	if len(params) == 3 {
		uploadID = params[2]
	}

	// in some cases just a plain error is being returned
	switch err.Error() {
	case "storage: bucket doesn't exist":
		err = BucketNotFound{
			Bucket: bucket,
		}
		return err
	case "storage: object doesn't exist":

        assertNull(roleQueryHelper.cookieNameMap);
        assertNotNull(roleQueryHelper.defaultRoleList);
        assertEquals(0, roleQueryHelper.defaultRoleList.size());
    }

    // Mock classes

    static class MockFessConfig extends FessConfig.SimpleImpl {
        @Override
        public String[] getSearchDefaultPermissionsAsArray() {
            return new String[] { "guest", "default" };
        }

    return ImmutableLongArray.copyOf(Arrays.asList(values));
  }

  // Test generators.  To let the GWT test suite generator access them, they need to be public named
  // classes with a public default constructor (not that we run these suites under GWT yet).

  @J2ktIncompatible
  @GwtIncompatible // used only from suite
  @AndroidIncompatible

        }
    }

    private boolean isExceptPrivateAccessible(Field field) {
        // to avoid warning of JDK-internal access at Java11
        // Lasta Di does not need private access to the classes
        final String fqcn = field.getDeclaringClass().getName();
        return fqcn.startsWith("java.") || fqcn.startsWith("jdk.") || fqcn.startsWith("com.sun.") || fqcn.startsWith("sun.");
    }

    /**

contents of the Program, including, for purposes of clarity any new file
in Source Code form that contains any contents of the Program. Modified
Works shall not include works that contain only declarations,
interfaces, types, classes, structures, or files of the Program solely
in each case in order to link to, bind by name, or subclass the Program
or Modified Works thereof.

"Distribute" means the acts of a) distributing or b) making available

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

////

使用 `str | None` 而不是單純的 `str`，可以讓編輯器幫你偵測錯誤，例如你以為某個值一定是 `str`，但它其實也可能是 `None`。

### 類別作為型別 { #classes-as-types }

你也可以用類別來宣告變數的型別。

假設你有一個 `Person` 類別，帶有名稱：

{* ../../docs_src/python_types/tutorial010_py310.py hl[1:3] *}

接著你可以宣告一個變數為 `Person` 型別：

        assertEquals("plugin", artifact.getName());
        assertEquals("", artifact.getVersion());
    }

    // Test inner classes
    @Test
    public void test_Artifact_constructor() {
        Artifact artifact = new Artifact("test", "1.0.0", "http://test.com/test.jar");
        assertEquals("test", artifact.getName());

      return mapGenerator;
    }
  }

  // TODO: investigate some API changes to SampleElements that would tidy up
  // parts of the following classes.

  static <K extends @Nullable Object, V extends @Nullable Object>
      TestSetGenerator<K> keySetGenerator(
          OneSizeTestContainerGenerator<Map<K, V>, Entry<K, V>> mapGenerator) {

                }
            }
        }
        return null;
    }

    /**
     * Stores the document IDs associated with a search query for tracking purposes.
     * This method caches the document IDs returned for a specific query to enable click tracking and analytics.
     *
     * @param queryId the unique identifier for the search query