// More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/namespaces/
  // +optional
  optional string namespace = 2;

  // Name of the referent.
  // More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#names
  // +optional
  optional string name = 3;

  // UID of the referent.

in a declaration, but it does not introduce a binding and thus is not declared.
In the package block, the identifier <code>init</code> may only be used for
<a href="#Package_initialization"><code>init</code> function</a> declarations,
and like the blank identifier it does not introduce a new binding.
</p>

<pre class="ebnf">

 
## Changes by Kind

### Deprecation

- #### Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:
  
  <!--
  This section can be blank if this pull request does not require a release note.
  
  When adding links which point to resources within git repositories, like

* Various scheduling features have graduated to beta:
  * You can now use [multiple schedulers](https://kubernetes.io/docs/tutorials/clusters/multiple-schedulers/)
  * [Nodes](https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#node-affinity-beta-feature) and [pods](https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#inter-pod-affinity-and-anti-affinity-beta-feature) now support affinity and anti-affinity

- The go version defined in `.go-version` is now fetched when invoking test, build, and code generation targets if the current go version does not match it. Set $FORCE_HOST_GO=y while testing or building to skip this behavior,...

[Extending the Kubernetes API with the aggregation layer](https://kubernetes.io/docs/concepts/api-extension/apiserver-aggregation/), [Configure the aggregation layer](https://kubernetes.io/docs/tasks/access-kubernetes-api/configure-aggregation-layer/), and [Setup an extension API server](https://kubernetes.io/docs/tasks/access-kubernetes-api/setup-extension-api-server/).

* [alpha] Adding admissionregistration API group which enables dynamic registration of initializers and external admission...

- Update Cluster Autoscaler version to 1.16.2 (CA release docs: https://github.com/kubernetes/autoscaler/releases/tag/cluster-autoscaler-1.16.2) ([#84038](https://github.com/kubernetes/kubernetes/pull/84038), [@losipiuk](https://github.com/losipiuk))

  - [Changelog since v1.20.5](#changelog-since-v1205)
  - [Important Security Information](#important-security-information-1)
    - [CVE-2021-25735: Validating Admission Webhook does not observe some previous fields](#cve-2021-25735-validating-admission-webhook-does-not-observe-some-previous-fields)
  - [Changes by Kind](#changes-by-kind-9)
    - [API Change](#api-change-2)
    - [Feature](#feature-5)

### Bug or Regression

- Fixed a bug in the CSI metrics that does not return not supported error when a CSI driver does not support metrics. ([#79851](https://github.com/kubernetes/kubernetes/pull/79851), [@jparklab](https://github.com/jparklab))