public class WebConfigPager implements Serializable {

    /**
     * Default constructor.
     */
    public WebConfigPager() {
        // Default constructor
    }

    private static final long serialVersionUID = 1L;

    /**
     * Default page size for pagination.
     */
    public static final int DEFAULT_PAGE_SIZE = 20;

    /**
     * Default current page number.
     */

     * This file should contain mappings that override default stemming for specific words.
     */
    @Required
    public MultipartFormFile stemmerOverrideFile;

    /**
     * Default constructor for UploadForm.
     * Creates a new instance with default values.
     */
    public UploadForm() {
        // Default constructor
    }

//     Optional value, default 64, range: 1-unlimited
//
//   - <S3MultiObjectDeleteLimit>
//     Some of the Veeam products use Multi Delete operations. This setting can reduce how many objects are included in one
//     multi-delete operation. The same registry key setting overwrites the storage-defined setting.

                    },
                    "deprecated": True,
                }
            },
            "/level1/level2/default5": {
                "get": {
                    "tags": ["level1a", "level1b", "level2a", "level2b"],
                    "summary": "Path5 Default Router4 Default",
                    "operationId": "path5_default_router4_default_level1_level2_default5_get",
                    "parameters": [

    /** Default interval time in milliseconds for web crawling. */
    public static final int DEFAULT_INTERVAL_TIME_FOR_WEB = 10000;

    /** Default number of threads for file system crawling. */
    public static final int DEFAULT_NUM_OF_THREAD_FOR_FS = 5;

    /** Default number of threads for web crawling. */
    public static final int DEFAULT_NUM_OF_THREAD_FOR_WEB = 1;

Python will complain if you put a value with a "default" before a value that doesn't have a "default".

But you can re-order them, and have the value without a default (the query parameter `q`) first.

It doesn't matter for **FastAPI**. It will detect the parameters by their names, types and default declarations (`Query`, `Path`, etc), it doesn't care about the order.

def Query(  # noqa: N802
    default: Annotated[
        Any,
        Doc(
            """
            Default value if the parameter field is not set.
            """
        ),
    ] = Undefined,
    *,
    default_factory: Annotated[
        Union[Callable[[], Any], None],
        Doc(
            """
            A callable to generate the default value.

    assert '"dom_id": "#swagger-ui"' in response.text, (
        "default configs should be preserved"
    )
    assert "presets: [" in response.text, "default configs should be preserved"
    assert "SwaggerUIBundle.presets.apis," in response.text, (
        "default configs should be preserved"
    )
    assert "SwaggerUIBundle.SwaggerUIStandalonePreset" in response.text, (
        "default configs should be preserved"
    )

        @app.get("/items/")
        def read_items(q: list[Item] = Query(default=None)):
            pass  # pragma: no cover


def test_invalid_tuple():
    with pytest.raises(AssertionError):
        app = FastAPI()

        class Item(BaseModel):
            title: str

        @app.get("/items/")
        def read_items(q: tuple[Item, Item] = Query(default=None)):
            pass  # pragma: no cover

    graph = ValueGraphBuilder.directed().build();

    assertThat(graph.edgeValueOrDefault(1, 2, DEFAULT)).isEqualTo(DEFAULT);
    assertThat(graph.edgeValueOrDefault(2, 1, DEFAULT)).isEqualTo(DEFAULT);
    assertThat(graph.edgeValue(1, 2).orElse(DEFAULT)).isEqualTo(DEFAULT);
    assertThat(graph.edgeValue(2, 1).orElse(DEFAULT)).isEqualTo(DEFAULT);
    assertThat(graph.edgeValueOrDefault(1, 2, null)).isNull();