In some special use cases (probably not very common), you might want to **restrict** the cookies that you want to receive.

Your API now has the power to control its own <abbr title="This is a joke, just in case. It has nothing to do with cookie consents, but it's funny that even the API can now reject the poor cookies. Have a cookie. 🍪">cookie consent</abbr>. 🤪🍪

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

{!> ../../docs_src/python_types/tutorial013.py!}
```

////

Python itself doesn't do anything with this `Annotated`. And for editors and other tools, the type is still `str`.

But you can use this space in `Annotated` to provide **FastAPI** with additional metadata about how you want your application to behave.

///

You would probably want to have the thing in charge of restarting your application as an **external component**, because by that point, the same application with Uvicorn and Python already crashed, so there's nothing in the same code of the same app that could do anything about it.

### Example Tools to Restart Automatically { #example-tools-to-restart-automatically }

                            * `security_scopes.scopes` will contain `[]` (nothing) for the *path operation* `read_system_status`, because it didn't declare any `Security` with `scopes`, and its dependency, `get_current_user`, doesn't declare any `scopes` either.

/// tip

The important and "magic" thing here is that `get_current_user` will have a different list of `scopes` to check for each *path operation*.

    /// note

    The `--no-cache-dir` is only related to `pip`, it has nothing to do with Docker or containers.

    ///

    The `--upgrade` option tells `pip` to upgrade the packages if they are already installed.

You could have turns as in the burgers example, first the living room, then the kitchen, but as you are not waiting 🕙 for anything, just cleaning and cleaning, the turns wouldn't affect anything.

It would take the same amount of time to finish with or without turns (concurrency) and you would have done the same amount of work.

 * normalizing configurations, and other system-related tasks.
 */
public class SystemHelper {

    /**
     * Constructs a new system helper.
     */
    public SystemHelper() {
        // do nothing
    }

    private static final Logger logger = LogManager.getLogger(SystemHelper.class);

    /** A map of design JSP file names. */

        if (uploadConfig) {
            switch (fesenType) {
            case Constants.FESEN_TYPE_CLOUD:
            case Constants.FESEN_TYPE_AWS:
                // nothing
                break;
            default:
                waitForConfigSyncStatus();
                sendConfigFiles(index);
                break;
            }
        }

///

## Order the parameters as you need { #order-the-parameters-as-you-need }

/// tip

This is probably not as important or necessary if you use `Annotated`.

///

Let's say that you want to declare the query parameter `q` as a required `str`.

        when(trans2.ensureConnected()).thenThrow(new IOException("Connection failed"));
        doNothing().when(trans2).close();

        when(trans1.unwrap(SmbTransportImpl.class)).thenReturn(trans1);
        when(trans1.ensureConnected()).thenReturn(true);
        when(trans1.acquire()).thenReturn(trans1);
        doNothing().when(trans1).close();

        // Return mocked transports