That means that, clients using your API don't have to check if the value exists or not, they can **assume the field will always be there**, but just that in some cases it will have the default value of `None`.

The way to describe this in OpenAPI, is to mark that field as **required**, because it will always be there.

Because of that, the JSON Schema for a model can be different depending on if it's used for **input or output**:

          <name>licenses</name>
          <version>3.0.0+</version>
          <description>
            <![CDATA[
            This element describes all the licenses for this project.
            Each license is described by a {@code license} element, which
            is then described by additional elements.
            Projects should only list the license(s) that applies to the project

### What is a Program { #what-is-a-program }

The word **program** is commonly used to describe many things:

* The **code** that you write, the **Python files**.
* The **file** that can be **executed** by the operating system, for example: `python`, `python.exe` or `uvicorn`.

`MultipartBody.Builder` can build sophisticated request bodies compatible with HTML file upload forms. Each part of a multipart request body is itself a request body, and can define its own headers. If present, these headers should describe the part body, such as its `Content-Disposition`. The `Content-Length` and `Content-Type` headers are added automatically if they're available.

=== ":material-language-kotlin: Kotlin"
    ```kotlin

   ([#125437](https://github.com/kubernetes/kubernetes/pull/125437), [@ardaguclu](https://github.com/ardaguclu)) [SIG CLI and Testing]
- "`kubectl describe service`" and "`kubectl describe ingress`" will now use endpointslices instead of endpoints.
   ([#124598](https://github.com/kubernetes/kubernetes/pull/124598), [@aroradaman](https://github.com/aroradaman)) [SIG CLI and Network]

- Fixed an issue where kubectl doesn't print image volume when kubectl describe a pod with that volume. ([#126706](https://github.com/kubernetes/kubernetes/pull/126706), [@carlory](https://github.com/carlory))

- Added Traffic Distribution field to `kubectl describe service` output ([#131491](https://github.com/kubernetes/kubernetes/pull/131491), [@tchap](https://github.com/tchap)) [SIG CLI]

- YAML input that might previously have been misinterpreted as JSON is now correctly accepted. ([#130666](https://github.com/kubernetes/kubernetes/pull/130666), [@thockin](https://github.com/thockin))
- [kubectl] Improved the describe output for projected volume sources to clearly indicate whether Secret and ConfigMap entries are optional. ([#129457](https://github.com/kubernetes/kubernetes/pull/129457), [@gshaibi](https://github.com/gshaibi)) [SIG CLI]

//// tab | Pydantic v2

In Pydantic version 2, you would use the attribute `model_config`, that takes a `dict` as described in <a href="https://docs.pydantic.dev/latest/api/config/" class="external-link" target="_blank">Pydantic's docs: Configuration</a>.

   * described in the class documentation.
   *
   * @throws NullPointerException if any of {@code elements} is null
   * @since 6.0
   */
  public static <E> ImmutableMultiset<E> copyOf(E[] elements) {
    return copyFromElements(elements);
  }

  /**
   * Returns an immutable multiset containing the given elements, in the "grouped iteration order"
   * described in the class documentation.
   *