public static final char MINUS_SIGN = '\u2212';

    /** FULLWIDTH HYPHEN-MINUS */
    public static final char FULLWIDTH_HYPHEN_MINUS = '\uFF0D';

    /** CENT SIGN */
    public static final char CENT_SIGN = '\u00A2';

    /** FULLWIDTH CENT SIGN */
    public static final char FULLWIDTH_CENT_SIGN = '\uFFE0';

    /** POUND SIGN */
    public static final char POUND_SIGN = '\u00A3';

```mermaid
graph TB
    subgraph "❌ Not Supported"
        direction TB
        subgraph V2["Pydantic v2 Model"]
            V1Field["Pydantic v1 Model"]
        end
        subgraph V1["Pydantic v1 Model"]
            V2Field["Pydantic v2 Model"]
        end
    end

    style V2 fill:#f9fff3
    style V1 fill:#fff6f0
    style V1Field fill:#fff6f0
    style V2Field fill:#f9fff3
```

You can use Pydantic's model configuration to `forbid` any `extra` fields:

{* ../../docs_src/header_param_models/tutorial002_an_py310.py hl[10] *}

If a client tries to send some **extra headers**, they will receive an **error** response.

For example, if the client tries to send a `tool` header with a value of `plumbus`, they will receive an **error** response telling them that the header parameter `tool` is not allowed:

```json
{
    "detail": [

    }

    // Do *not* override offset() to delegate: We want to test the default implementation.

    @Override
    public long distance(Integer start, Integer end) {
      return DELEGATE.distance(start, end);
    }

    @Override
    public Integer minValue() {
      return DELEGATE.minValue();
    }

    @Override
    public Integer maxValue() {

        } catch (final Exception e) {
            this.treeHandle.release();
            throw e;
        }

    }

    private FileEntry open() throws CIFSException {
        this.treeHandle.send(this.request, this.response);
        checkStatus();
        final FileEntry n = advance();
        if (n == null) {
            doClose();
        }
        return n;
    }

    /**

cond) v.YminusX.Select(&a.YminusX, &b.YminusX, cond) v.T2d.Select(&a.T2d, &b.T2d, cond) return v } // CondNeg negates v if cond == 1 and leaves it unchanged if cond == 0. func (v *projCached) CondNeg(cond int) *projCached { v.YplusX.Swap(&v.YminusX, cond) v.T2d.Select(new(field.Element).Negate(&v.T2d), &v.T2d, cond) return v } // CondNeg negates v if cond == 1 and leaves it unchanged if cond == 0. func (v *affineCached) CondNeg(cond int) *affineCached { v.YplusX.Swap(&v.YminusX, cond) v.T2d.Sele...

        return m.lookingAt();
    }

    public String region() {
        return input.substring(markPos, pos);
    }

    /**
     * Moves the position to the next instance of the given character, or the end of the input if not found.
     */
    public void find(char c) {
        int cpos = pos;
        while (cpos < input.length()) {
            if (input.charAt(cpos) == c) {
                break;
            }

def get_query(background_tasks: BackgroundTasks, q: str | None = None):
    if q:
        message = f"found query: {q}\n"
        background_tasks.add_task(write_log, message)
    return q


@app.post("/send-notification/{email}")
async def send_notification(
    email: str, background_tasks: BackgroundTasks, q: Annotated[str, Depends(get_query)]
):
    message = f"message to {email}\n"

from tests.utils import workdir_lock

client = TestClient(app)


@workdir_lock
def test():
    log = Path("log.txt")
    if log.is_file():
        os.remove(log)  # pragma: no cover
    response = client.post("/send-notification/******@****.***")
    assert response.status_code == 200, response.text
    assert response.json() == {"message": "Notification sent in the background"}
    with open("./log.txt") as f:

            throw new SmbEndOfFileException();
        });
        assertEquals("Unexpectedly reached end of file", thrown.getMessage());
    }

    /**
     * toString should include both the class name and the default message.
     */
    @ParameterizedTest
    @ValueSource(strings = { "SmbEndOfFileException", "Unexpectedly reached end of file" })
    void toStringContainsKeyInfo(String expectedSubstring) {
        // Arrange