Sascha Grossenbacher
--- a/core/lib/Drupal/Core/KeyValueStore/KeyValueDatabaseExpirableFactory.php
+++ b/core/lib/Drupal/Core/KeyValueStore/KeyValueDatabaseExpirableFactory.php
    }
  }

+  /**
+   * {@inheritdoc}
+   */
+  public function run() {
+    $this->garbageCollection();
+    return TRUE;
+  }
--- a/core/lib/Drupal/Core/Cache/CacheFactory.php
+++ b/core/lib/Drupal/Core/Cache/CacheFactory.php
    return $this->container->get($service_name)->get($bin);
  }

+  /**
+   * {@inheritdoc}
+   */
+  public function run() {
--- a/core/lib/Drupal/Core/CronSubscriberInterface.php 0 → 100644
+++ b/core/lib/Drupal/Core/CronSubscriberInterface.php 0 → 100644
+
+namespace Drupal\Core;
+
+/**
+ * Allows to delegate cron tasks to services.
+ *
+ * Use the tag cron on the service that implements this interface.
+ *
+ * @see hook_cron()
+ */
+interface CronSubscriberInterface {
+
+  /**
+   * Executes a cron task.
+   */
+  public function runCron(): void;
--- a/core/core.services.yml
+++ b/core/core.services.yml
    class: Drupal\Core\Cron
    arguments: ['@module_handler', '@lock', '@queue', '@state', '@account_switcher', '@logger.channel.cron', '@plugin.manager.queue_worker', '@datetime.time', '%queue.config%']
    lazy: true
+    tags:
+      - { name: service_collector, call: addCronService, tag: cron }
--- a/core/core.services.yml
+++ b/core/core.services.yml
    class: Drupal\Core\Cron
    arguments: ['@module_handler', '@lock', '@queue', '@state', '@account_switcher', '@logger.channel.cron', '@plugin.manager.queue_worker', '@datetime.time', '%queue.config%']
    lazy: true
+    tags:
+      - { name: service_collector, call: addCronService, tag: cron }