* doubling the table causes no thread to hash to it under
   * expanded mask.  We do not try to detect or remove such cells,
   * under the assumption that for long-running instances, observed
   * contention levels will recur, so the cells will eventually be
   * needed again; and for short-lived ones, it does not matter.
   */

  /**
   * Padded variant of AtomicLong supporting only raw accesses plus CAS. The value field is placed

    * If the token contains `foobar`, the content of the `Authorization` header would be: `Bearer foobar`.

## **FastAPI**'s `OAuth2PasswordBearer`

**FastAPI** provides several tools, at different levels of abstraction, to implement these security features.

In this example we are going to use **OAuth2**, with the **Password** flow, using a **Bearer** token. We do that using the `OAuth2PasswordBearer` class.

!!! info

#### Optimizations

A naive implementation would simply regenerate all resources, of all subscribed types, for each client, on any configuration change. However, this scales poorly. As a result, we have many levels of optimizations to avoid doing this work.

#### Output to dirs

The output of the manifest is concatenated into a single file. To generate a directory hierarchy with subdirectory
levels representing a child dependency, use the following command:

```bash
istioctl manifest generate -o istio_manifests
```

!!! note
    You don't necessarily need to add different scopes in different places.

    We are doing it here to demonstrate how **FastAPI** handles scopes declared at different levels.

=== "Python 3.10+"

    ```Python hl_lines="4  139  170"
    {!> ../../../docs_src/security/tutorial005_an_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="4  139  170"

    Ordering<Number> c = objects.compound(numbers);

    Ordering<Integer> d = numbers.compound(integers);
    Ordering<Integer> e = integers.compound(numbers);

    // This works with three levels too (IDEA falsely reports errors as noted
    // below. Both javac and eclipse handle these cases correctly.)

    Ordering<Number> f = numbers.compound(objects).compound(objects); // bad IDEA

    Ordering<Number> c = objects.compound(numbers);

    Ordering<Integer> d = numbers.compound(integers);
    Ordering<Integer> e = integers.compound(numbers);

    // This works with three levels too (IDEA falsely reports errors as noted
    // below. Both javac and eclipse handle these cases correctly.)

    Ordering<Number> f = numbers.compound(objects).compound(objects); // bad IDEA

		unlockOnDefer = true
	}

	checkPrecondFn := opts.CheckPrecondFn
	opts.CheckPrecondFn = nil // do not need to apply pre-conditions at lower layer.
	opts.NoLock = true        // no locks needed at lower levels for getObjectInfo()
	objInfo, zIdx, err := z.getLatestObjectInfoWithIdx(ctx, bucket, object, opts)
	if err != nil {
		if objInfo.DeleteMarker {
			if opts.VersionID == "" {
				return &GetObjectReader{

That information will be included in the generated OpenAPI and used by the documentation user interfaces and external tools.

!!! note
    Keep in mind that different tools might have different levels of OpenAPI support.

    Some of them might not show all the extra information declared yet, although in most of the cases, the missing feature is already planned for development.

You can add a `title`:

- The kube-apiserver will no longer serve APIs that should have been deleted in GA non-alpha levels.  Alpha levels will continue to serve the removed APIs so that CI doesn't immediately break. ([#96525](https://github.com/kubernetes/kubernetes/pull/96525), [@deads2k](https://github.com/deads2k)) [SIG API Machinery]