return phases();
    }

    /**
     * Stream of phases containing all child phases recursively.
     *
     * @return a stream of all phases in this lifecycle, including nested phases
     */
    default Stream<Phase> allPhases() {
        return phases().stream().flatMap(Phase::allPhases);
    }

    /**
     * Collection of aliases for this lifecycle.

     *   </li>
     *   <li>All attached artifacts in the order they were attached</li>
     * </ul>
     * The contents depend on the current lifecycle phase when this method is called, as artifacts
     * are typically attached during specific phases (e.g., sources jar during package phase).
     *
     * @param project the project to get artifacts for
     * @return an immutable ordered collection of all project artifacts

 */
package org.apache.maven.api;

import java.util.Optional;

import org.apache.maven.api.annotations.Experimental;
import org.apache.maven.api.annotations.Nonnull;

/**
 * Event sent by maven during various phases of the build process.
 * Such events can be listened to using {@link Listener}s objects
 * registered in the {@link Session}.
 *
 * @since 4.0.0
 */
@Experimental
public interface Event {

    /**

     * present, are appended, to those specified on CLI input, if any.
     */
    Optional<String> atFile();

    /**
     * Returns the list of goals and phases to execute.
     *
     * @return an {@link Optional} containing the list of goals and phases to execute, or empty if not specified
     */
    @Nonnull
    Optional<List<String>> goals();

    /**

      listeners.get(i).dispatch();
    }
  }

  /**
   * A special purpose queue/executor that dispatches listener events serially on a configured
   * executor. Each event can be added and dispatched as separate phases.
   *
   * <p>This class is very similar to {@link SequentialExecutor} with the exception that events can
   * be added without necessarily executing immediately.
   */

These operate in a similar manner as [`controller-runtime`](https://github.com/kubernetes-sigs/controller-runtime) but are *far* smaller and less abstract.

With a few exceptions, Istio controllers typically are split in two phases: construction and running.

Construction should create informers (via `kclient.New`), setup a queue (via `controllers.NewQueue`), and register event handlers on the informers.

      listeners.get(i).dispatch();
    }
  }

  /**
   * A special purpose queue/executor that dispatches listener events serially on a configured
   * executor. Each event can be added and dispatched as separate phases.
   *
   * <p>This class is very similar to {@link SequentialExecutor} with the exception that events can
   * be added without necessarily executing immediately.
   */

- : `kubeadm upgrade apply` now supports phase sub-command, users can use `kubeadm upgrade apply phase <phase-name>` to execute the specified phase, or use `kubeadm upgrade apply --skip-phases <phase-names>` to skip some phases during cluster upgrade. ([#126032](https://github.com/kubernetes/kubernetes/pull/126032), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]

// listSem is a semaphore restricting concurrent invocations of 'go list'. 'go
// list' has its own internal concurrency, so we use a hard-coded constant (to
// allow the I/O-intensive phases of 'go list' to overlap) instead of scaling
// all the way up to GOMAXPROCS.
var listSem = make(chan semToken, 2)

type semToken struct{}

- Kubeadm: add the `--dry-run` flag to the `control-plane` phase of "kubeadm init". ([#102722](https://github.com/kubernetes/kubernetes/pull/102722), [@vinayakankugoy...