this.output = output;
        }

        @Override
        public void start() {
            // Override start to do nothing in test - simulate immediate completion
        }

        @Override
        public void run() {
            // Override run to do nothing in test
        }

        @Override
        public String getOutput() {

   * listeners are also applicable to heavyweight callbacks passed to this method.
   *
   * <p>For a more general interface to attach a completion listener, see {@link #addListener}.
   *
   * <p>This method is similar to {@link java.util.concurrent.CompletableFuture#whenComplete} and

        indexUpdater.start();

        // Let it run briefly
        ThreadUtil.sleep(100);

        // Stop the indexer
        indexUpdater.setFinishCrawling(true);

        // Wait for completion with longer timeout
        indexUpdater.join(3000);

        assertFalse(errorOccurred.get());
        // Thread may still be alive in test environment, just check no errors

* Add support for 3rd party objects to kubectl label ([#24882](https://github.com/kubernetes/kubernetes/pull/24882), [@brendandburns](https://github.com/brendandburns))
* Move shell completion generation into 'kubectl completion' command ([#23801](https://github.com/kubernetes/kubernetes/pull/23801), [@sttts](https://github.com/sttts))

### Feature

- Add fish shell completion to kubectl ([#92989](https://github.com/kubernetes/kubernetes/pull/92989), [@WLun001](https://github.com/WLun001)) [SIG CLI]
- Added PowerShell completion generation by running `kubectl completion powershell` ([#103758](https://github.com/kubernetes/kubernetes/pull/103758), [@zikhan](https://github.com/zikhan)) [SIG CLI]

=== ":material-language-kotlin: Kotlin"
    ```kotlin
      class UploadProgress {

        companion object {
          private const val IMGUR_CLIENT_ID = "9199fdef135c122"

  balancer notices that it has been killed. ([#97238](https://github.com/kubernetes/kubernetes/pull/97238), [@andrewsykim](https://github.com/andrewsykim))

- Kubectl now supports shell completion for the <type>/<name> format for specifying resources.
  kubectl now provides shell completion for container names following the `--container/-c` flag of the `exec` command.

* Increase Dashboard UI version to v1.4.0-beta2 ([#31518](https://github.com/kubernetes/kubernetes/pull/31518), [@bryk](https://github.com/bryk))
* Fixed incomplete kubectl bash completion. ([#31333](https://github.com/kubernetes/kubernetes/pull/31333), [@xingzhou](https://github.com/xingzhou))

    * kubectl `--user` and `--cluster` now support completion ([#44251](https://github.com/kubernetes/kubernetes/pull/44251), [@superbrothers](https://github.com/superbrothers))

    * `kubectl config use-context` now supports completion ([#42336](https://github.com/kubernetes/kubernetes/pull/42336), [@superbrothers](https://github.com/superbrothers))