assertNull(trace.data());
    }

    @Test
    void testChainedTraces() {
        RequestTrace root = new RequestTrace("root", null, "root-data");
        RequestTrace level1 = new RequestTrace("level1", root, "level1-data");
        RequestTrace level2 = new RequestTrace("level2", level1, "level2-data");
        RequestTrace level3 = new RequestTrace(level2, "level3-data");

        // Verify the chain

The `data` field is always encoded as JSON. You can pass any value that can be serialized as JSON, including Pydantic models.

## Raw Data { #raw-data }

If you need to send data **without** JSON encoding, use `raw_data` instead of `data`.

This is useful for sending pre-formatted text, log lines, or special <dfn title="A value used to indicate a special condition or state">"sentinel"</dfn> values like `[DONE]`.

type WriteTest struct {
	Name   string
	Data   []byte
	Method uint16
	Mode   fs.FileMode
}

var writeTests = []WriteTest{
	{
		Name:   "foo",
		Data:   []byte("Rabbits, guinea pigs, gophers, marsupial rats, and quolls."),
		Method: Store,
		Mode:   0666,
	},
	{
		Name:   "bar",
		Data:   nil, // large data set in the test
		Method: Deflate,
		Mode:   0644,
	},
	{

            searchPaging(data, form);
        });
    }

    /**
     * Sets up data for search result pagination.
     *
     * @param data the render data
     * @param form the search form
     */
    protected void searchPaging(final RenderData data, final SearchForm form) {

        }
        if (offset + length > data.length) {
            throw new IllegalArgumentException("Offset + length exceeds data buffer size");
        }
        if (offset + SIGNATURE_OFFSET + SIGNATURE_LENGTH > data.length) {
            throw new IllegalArgumentException("Signature field exceeds data buffer size");
        }

        // Use fine-grained locking for better concurrency

        @app.post("/union")
        def endpoint(data: dict | ModelV1A):  # pragma: no cover
            return data


def test_raises_pydantic_v1_model_in_sequence() -> None:
    class ModelV1A(BaseModel):
        name: str

    app = FastAPI()

    with pytest.raises(PydanticV1NotSupportedError):

        @app.post("/sequence")
        def endpoint(data: list[ModelV1A]):  # pragma: no cover

            searchPaging(data, form);
        });
    }

    /**
     * Sets up search paging data for rendering the search log list.
     *
     * @param data the render data to populate
     * @param form the search form containing current search criteria
     */
    protected void searchPaging(final RenderData data, final SearchForm form) {

import jakarta.validation.constraints.Min;
import jakarta.validation.constraints.Size;

/**
 * Form class for creating data store configurations.
 * Data configs allow administrators to set up crawling of various data sources
 * including databases, CSV files, and other structured data sources.
 */
public class CreateForm {

    /**
     * Creates a new CreateForm instance.
     */
    public CreateForm() {

    /** The underlying DFS referral data */
    private final DfsReferralData data;

    /**
     * Constructs a DfsReferral with the specified referral data
     *
     * @param data the DFS referral data
     */
    public DfsReferral(final DfsReferralData data) {
        this.data = data;
    }

    /**
     * Get the DFS referral data associated with this referral
     *

    assert state["context_a"] == "finished a"


def test_background_tasks():
    response = client.get("/context_b_bg")
    data = response.json()
    assert data["context_b"] == "started b"
    assert data["context_a"] == "started a"
    assert data["bg"] == "not set"
    middleware_state = json.loads(response.headers["x-state"])
    assert middleware_state["context_b"] == "started b"