* @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getSearchEngineUsername();

    /**
     * Get the value for the key 'search_engine.username' as {@link Integer}. <br>
     * The value is, e.g.  <br>
     * comment: Username for authenticating to the search engine.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)

     * @return The value of found property. (NotNull: if not found, exception)
     * @throws ConfigPropertyNotFoundException When the property is not found.
     */
    String get(String propertyKey);

    /**
     * Is the property true?
     * @param propertyKey The key of the property which is boolean type. (NotNull)
     * @return The determination, true or false. (if not found, exception)

                                    }
                                }
                            },
                        },
                        "404": {
                            "description": "Not Found",
                            "content": {
                                "application/json": {
                                    "schema": {
                                        "title": "Response 404 Foo Post Root",

    responses={404: {"description": "Not found"}},
)


fake_items_db = {"plumbus": {"name": "Plumbus"}, "gun": {"name": "Portal Gun"}}


@router.get("/")
async def read_items():
    return fake_items_db


@router.get("/{item_id}")
async def read_item(item_id: str):
    if item_id not in fake_items_db:
        raise HTTPException(status_code=404, detail="Item not found")

        }
    }

    /**
     * Retrieves a setting value by key.
     * @param key The key of the setting.
     * @return The setting value, or null if not found.
     */
    public Object get(final String key) {
        final GetResponse getResponse =
                client.prepareGet().setIndex(settingsIndexName).setId(settingsId).execute().actionGet(getSearchTimeout());

def test_path_operation_not_found():
    response = client.get("/items/bar")
    assert response.status_code == 404, response.text
    assert response.json() == {"message": "Item not found"}


def test_openapi_schema():
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",

                }
                return s;
            }).allMatch(s -> {
                final boolean found = new File(s).isFile();
                if (found && logger.isDebugEnabled()) {
                    logger.debug("Generator command found: {}", s);
                }
                return found;
            });
        } else {
            available = true;
        }
        return available;
    }

     */
    @Override
    public void update(final AccessResultImpl<Long> accessResult) {
        final Map<String, AccessResultImpl<Long>> arMap = dataHelper.getAccessResultMap(accessResult.getSessionId());
        if (!arMap.containsKey(accessResult.getUrl())) {
            throw new CrawlerSystemException(accessResult.getUrl() + " is not found.");
        }

class Message(BaseModel):
    message: str


app = FastAPI()


@app.get(
    "/items/{item_id}",
    response_model=Item,
    responses={
        404: {"model": Message, "description": "The item was not found"},
        200: {
            "description": "Item requested by ID",
            "content": {
                "application/json": {
                    "example": {"id": "bar", "value": "The bar tenders"}
                }

```

</div>

После этого, если перейти по адресам `/openapi.json`, `/docs` или `/redoc`, вы получите ошибку `404 Not Found`, например:

```JSON
{
    "detail": "Not Found"
}