*
     * Historical note: At one point, we'd declared this method as accepting and returning nullable
     * values. For details on that, see earlier revisions of this file.
     */
    return convert(a);
  }

  /**
   * Indicates whether another object is equal to this converter.
   *

      (an example is provided in the Appendix below).

      "Derivative Works" shall mean any work, whether in Source or Object
      form, that is based on (or derived from) the Work and for which the
      editorial revisions, annotations, elaborations, or other modifications
      represent, as a whole, an original work of authorship. For the purposes
      of this License, Derivative Works shall not include works that remain

  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.example.group</groupId>
  <artifactId>valid-version-revision</artifactId>
  <version>${revision}</version>

  <description>
    This will test if the validation for the ci friendly versions
    is working correct.
  </description>

        CliRequest request = new CliRequest(new String[] {"-Drevision=8.1.0", "-Drevision=8.2.0"}, null);

        cli.initialize(request);
        // read .mvn/maven.config
        cli.cli(request);
        cli.properties(request);

        String revision = request.getUserProperties().getProperty("revision");
        assertEquals("8.2.0", revision);
    }

    /**

// old version and then later decides to switch back to the old revision again.
func DeactivateIstioInjectionWebhook(ctx context.Context, client kubernetes.Interface) error {
	whs, err := GetWebhooksWithRevision(ctx, client, DefaultRevisionName)
	if err != nil {
		return err
	}
	if len(whs) == 0 {
		// no revision with default, no action required.
		return nil
	}

			return nil
		},
	}

	waypointApplyCmd.Flags().StringVarP(&revision, "revision", "r", "", "The revision to label the waypoint with")
	waypointApplyCmd.Flags().BoolVarP(&waitReady, "wait", "w", false, "Wait for the waypoint to be ready")
	waypointGenerateCmd.Flags().StringVarP(&revision, "revision", "r", "", "The revision to label the waypoint with")
	waypointCmd.AddCommand(waypointGenerateCmd)

* fix detach azure disk issue due to dirty cache ([#71495](https://github.com/kubernetes/kubernetes/pull/71495), [@andyzhangx](https://github.com/andyzhangx))
* Fixes ability for admin/edit/view users to see controller revisions, needed for kubectl rollout commands ([#70699](https://github.com/kubernetes/kubernetes/pull/70699), [@liggitt](https://github.com/liggitt))

- Fixed ability for admin/edit/view users to see controller revisions, needed for kubectl rollout commands ([#70699](https://github.com/kubernetes/kubernetes/pull/70699), [@liggitt](https://github.com/liggitt))
- `kubectl rollout undo` now returns errors when attempting to rollback a deployment to a non-existent revision ([#70039](https://github.com/kubernetes/kubernetes/pull/70039), [@liggitt](https://github.com/liggitt))

type ControlPlaneOptions struct {
	// Revision is the istio.io/rev control plane revision
	Revision string
}

// AttachControlPlaneFlags attaches control-plane flags to a Cobra command.
// (Currently just --revision)
func (o *ControlPlaneOptions) AttachControlPlaneFlags(cmd *cobra.Command) {
	cmd.PersistentFlags().StringVarP(&o.Revision, "revision", "r", "",
		"Control plane revision")

	tcs := []struct {
		name          string
		tag           string
		revision      string
		webhookBefore *admitv1.MutatingWebhookConfiguration
		outputMatches []string
		error         string
	}{
		{
			name:          "TestErrorWhenRevisionWithNameCollision",
			tag:           "revision",
			revision:      "revision",
			webhookBefore: &revisionCanonicalWebhook,
			outputMatches: []string{},