trait StatusCheckTrait

trait StatusCheckTrait {
    
    /**
     * Runs a status check for a stage and returns the results, if any.
     *
     * @param \Drupal\package_manager\StageBase $stage
     *   The stage to run the status check for.
     * @param \Symfony\Contracts\EventDispatcher\EventDispatcherInterface|null $event_dispatcher
     *   (optional) The event dispatcher service.
     * @param \Drupal\package_manager\PathLocator|null $path_locator
     *   (optional) The path locator service.
     * @param \PhpTuf\ComposerStager\API\Path\Factory\PathFactoryInterface|null $path_factory
     *   (optional) The path factory service.
     *
     * @return \Drupal\package_manager\ValidationResult[]
     *   The results of the status check. If a readiness check was also done,
     *   its results will be included.
     */
    protected function runStatusCheck(StageBase $stage, ?EventDispatcherInterface $event_dispatcher = NULL, ?PathLocator $path_locator = NULL, ?PathFactoryInterface $path_factory = NULL) : array {
        $event_dispatcher ??= \Drupal::service('event_dispatcher');
        $path_locator ??= \Drupal::service(PathLocator::class);
        $path_factory ??= \Drupal::service(PathFactoryInterface::class);
        try {
            $paths_to_exclude_event = new CollectPathsToExcludeEvent($stage, $path_locator, $path_factory);
            $event_dispatcher->dispatch($paths_to_exclude_event);
        } catch (\Throwable $throwable) {
            $paths_to_exclude_event = $throwable;
        }
        $event = new StatusCheckEvent($stage, $paths_to_exclude_event);
        return $event_dispatcher->dispatch($event)
            ->getResults();
    }

}