14 files declare their use of ConfigEvents in Zircon Profile 8

ConfigCacheTag.php in core/modules/system/src/EventSubscriber/ConfigCacheTag.php

Contains \Drupal\system\EventSubscriber\ConfigCacheTag.

ConfigEventsTest.php in core/modules/config/src/Tests/ConfigEventsTest.php

Contains \Drupal\config\Tests\ConfigEventsTest.

ConfigSchemaChecker.php in core/lib/Drupal/Core/Config/Testing/ConfigSchemaChecker.php

Contains \Drupal\Core\Config\Testing\ConfigSchemaChecker.

ConfigSnapshotSubscriber.php in core/lib/Drupal/Core/EventSubscriber/ConfigSnapshotSubscriber.php

Contains \Drupal\Core\EventSubscriber\ConfigSnapshotSubscriber.

ConfigSubscriber.php in core/modules/config/src/ConfigSubscriber.php

Contains \Drupal\config\ConfigSubscriber.

ConfigSubscriber.php in core/modules/language/src/EventSubscriber/ConfigSubscriber.php

Contains \Drupal\language\EventSubscriber\ConfigSubscriber.

ContentTranslationUpdatesManager.php in core/modules/content_translation/src/ContentTranslationUpdatesManager.php

Contains \Drupal\content_translation\ContentTranslationUpdatesManager.

EventSubscriber.php in core/modules/config/tests/config_import_test/src/EventSubscriber.php

Contains \Drupal\config_import_test\EventSubscriber.

EventSubscriber.php in core/modules/config/tests/config_collection_install_test/src/EventSubscriber.php

Contains \Drupal\config_collection_install_test\EventSubscriber.

EventSubscriber.php in core/modules/config/tests/config_events_test/src/EventSubscriber.php

Contains \Drupal\config_events_test\EventSubscriber.

FinalMissingContentSubscriber.php in core/lib/Drupal/Core/Config/Importer/FinalMissingContentSubscriber.php

Contains \Drupal\Core\Config\Importer\FinalMissingContentSubscriber.

LocaleConfigSubscriber.php in core/modules/locale/src/LocaleConfigSubscriber.php

Contains \Drupal\locale\LocaleConfigSubscriber.

QueryFactory.php in core/lib/Drupal/Core/Config/Entity/Query/QueryFactory.php

Contains \Drupal\Core\Config\Entity\Query\QueryFactory.

SystemConfigSubscriber.php in core/modules/system/src/SystemConfigSubscriber.php

Contains \Drupal\system\SystemConfigSubscriber.