app = FastAPI()


@app.post("/items/")
async def create_item(item: Item, project_id: Annotated[int, Query(...)]): ...
```

## Return Type or Response Model

When possible, include a return type. It will be used to validate, filter, document, and serialize the response.

```python
from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str

     * for the specified servlet request.
     *
     * @param tc the CIFS context to use
     *
     * @param req
     *            The request being serviced.
     * @param resp
     *            The response.
     * @param challenge
     *            The domain controller challenge.
     * @return credentials passed in the servlet request
     * @throws IOException
     *             If an IO error occurs.
     */

  }

  private fun executeSynchronously(request: Request): RecordedResponse {
    val call = client.newCall(request)
    return try {
      val response = call.execute()
      val bodyString = response.body.string()
      RecordedResponse(request, response, null, bodyString, null)
    } catch (e: IOException) {
      RecordedResponse(request, null, null, null, e)
    }
  }

    server.start()

    val call1 =
      client.newCall(
        Request
          .Builder()
          .url(server.url("/"))
          .build(),
      )
    call1.execute().use { response -> response.body.string() }

    listener.shouldClose = true
    // Large headers are a likely reason the servers would cut off the connection before it completes sending
    // request headers.

 */
package jcifs.internal.witness;

/**
 * Represents a witness heartbeat response as defined in MS-SWN specification.
 * Contains the result of a witness heartbeat request.
 */
public class WitnessHeartbeatResponse {
    /**
     * Creates a new witness heartbeat response.
     */
    public WitnessHeartbeatResponse() {
        // Default constructor
    }

 */
package jcifs.internal.witness;

/**
 * Represents a witness registration response as defined in MS-SWN specification.
 * Contains the result of a witness registration request.
 */
public class WitnessRegisterResponse {
    /**
     * Creates a new witness register response.
     */
    public WitnessRegisterResponse() {
        // Default constructor
    }

	// 		// connection. 5 minutes is sufficient time for any idle connection.
	// 		trhttp2.ReadIdleTimeout = 5 * time.Minute
	// 		// PingTimeout is the timeout after which the connection will be closed
	// 		// if a response to Ping is not received.
	// 		trhttp2.PingTimeout = dialTimeout
	// 		// DisableCompression, if true, prevents the Transport from
	// 		// requesting compression with an "Accept-Encoding: gzip"

     */
    @Override
    public Logger getLogger() {
        return logger;
    }

    /**
     * Stores parsed data from response into result data.
     * Processes HTML content using XPath expressions and handles robots tags.
     *
     * @param responseData the response data from crawling
     * @param resultData the result data to store processed information
     */
    @Override

    }

    @Test
    public void test_assistantFactory() {
        final LlmMessage message = LlmMessage.assistant("Assistant response");
        assertEquals(LlmMessage.ROLE_ASSISTANT, message.getRole());
        assertEquals("Assistant response", message.getContent());
    }

    @Test
    public void test_settersAndGetters() {
        final LlmMessage message = new LlmMessage();

{* ../../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": [
        {
            "type": "extra_forbidden",