}

        buffer.append(' ').append(message);

        // CHECKSTYLE_OFF: LineLength
        problems.add(new ModelProblemCollectorRequest(severity, version)
                .setMessage(buffer.toString())
                .setLocation(getLocation(fieldName, tracker)));
        // CHECKSTYLE_ON: LineLength
    }

    private static InputLocation getLocation(String fieldName, InputLocationTracker tracker) {

    contact: Optional[Contact] = None
    license: Optional[License] = None
    version: str


class ServerVariable(BaseModelWithConfig):
    enum: Annotated[Optional[list[str]], Field(min_length=1)] = None
    default: str
    description: Optional[str] = None


class Server(BaseModelWithConfig):
    url: Union[AnyUrl, str]
    description: Optional[str] = None

app = FastAPI()


@app.get("/items/{item_id}")
def main(
    item_id: int = Path(default=..., gt=0),
    query: str = Query(default=..., max_length=10),
    session: str = Cookie(default=..., min_length=3),
    x_trace: str = Header(default=..., title="Tracing header"),
):
    return {"message": "Hello World"}
```

...all these parameters are required because the default value is `...` (Ellipsis).