This is particularly useful when automatically generating clients or
                SDKs for your API.

                Read more about it in the
                [FastAPI docs about how to Generate Clients](https://fastapi.tiangolo.com/advanced/generate-clients/#custom-generate-unique-id-function).
                """
            ),
        ] = Default(generate_unique_id),

                Read more about it in the
                [FastAPI docs about how to Generate Clients](https://fastapi.tiangolo.com/advanced/generate-clients/#custom-generate-unique-id-function).
                """
            ),
        ] = Default(generate_unique_id),
    ) -> None:
        """
        Include an `APIRouter` in the same app.

        Read more about it in the

    * Read other ideas, articles, and read about tools I have created.
    * Follow me to read when I publish something new.

## Tweet about **FastAPI**

<a href="https://twitter.com/compose/tweet?text=I'm loving @fastapi because... https://github.com/tiangolo/fastapi" class="external-link" target="_blank">Tweet about **FastAPI**</a> and let me and others know why you like it. 🎉

		Long:  "A group of commands used to update or retrieve Ztunnel configuration from a Ztunnel instance.",
		Example: `  # Retrieve summary about workload configuration
  istioctl x ztunnel-config workload

  # Retrieve summary about certificates
  istioctl x ztunnel-config certificates`,
		Aliases: []string{"zc"},
	}

	configCmd.AddCommand(logCmd(ctx))
	configCmd.AddCommand(workloadConfigCmd(ctx))

I'll show you some concrete examples in the next chapters.

---

Then the next concepts to consider are all about the program running your actual API (e.g. Uvicorn).

## Program and Process

We will talk a lot about the running "**process**", so it's useful to have clarity about what it means, and what's the difference with the word "**program**".

### What is a Program

  // More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata
  // +optional
  optional k8s.io.apimachinery.pkg.apis.meta.v1.ObjectMeta metadata = 1;

  // Spec holds information about the request being evaluated.  spec.namespace must be equal to the namespace
  // you made the request against.  If empty, it is defaulted.
  optional SubjectAccessReviewSpec spec = 2;

 * @param {Map} fileOwners mapping of platform name to a list of files involved in the change located in that platform
 * @param {[FileMetadata]} fileMetadatas - gitStream's list of metadata about file changes in the PR including path
 * @returns {[Object]} Returns a list of objects for each platform containing info about the changes to files in that platform

  // +listType=atomic
  repeated string usages = 5;

  // Information about the requesting user.
  // See user.Info interface for details.
  // +optional
  optional string username = 2;

  // UID information about the requesting user.
  // See user.Info interface for details.
  // +optional
  optional string uid = 3;

  // Group information about the requesting user.
  // See user.Info interface for details.

name: IDE Experience team notifier
run-name: Notify the IDE Experience team about relevant issues
on:
  issues:
    types:
      - labeled

permissions: {}

jobs:
  send-slack-notification:
    if: ${{ github.event.label.name == 'in:ide' || github.event.label.name == 'in:eclipse-plugin' || github.event.label.name == 'in:idea-plugin' || github.event.label.name == 'in:tooling-api' }}
    runs-on: ubuntu-latest
    steps:

I think `Union[SomeType, None]` is more explicit about what it means.

It's just about the words and names. But those words can affect how you and your teammates think about the code.

As an example, let's take this function:

```Python hl_lines="1  4"
{!../../../docs_src/python_types/tutorial009c.py!}
```