22 files declare their use of ConfigEvents

AdvisoriesConfigSubscriber.php in core/modules/system/src/EventSubscriber/AdvisoriesConfigSubscriber.php
CKEditor5CacheTag.php in core/modules/ckeditor5/src/EventSubscriber/CKEditor5CacheTag.php
ColorConfigCacheInvalidator.php in core/modules/color/src/EventSubscriber/ColorConfigCacheInvalidator.php
ConfigCacheTag.php in core/modules/system/src/EventSubscriber/ConfigCacheTag.php
ConfigEventsTest.php in core/tests/Drupal/KernelTests/Core/Config/ConfigEventsTest.php
ConfigSchemaChecker.php in core/lib/Drupal/Core/Config/Development/ConfigSchemaChecker.php
ConfigSnapshotSubscriber.php in core/lib/Drupal/Core/EventSubscriber/ConfigSnapshotSubscriber.php
ConfigSubscriber.php in core/modules/language/src/EventSubscriber/ConfigSubscriber.php
ConfigSubscriber.php in core/modules/config/src/ConfigSubscriber.php
EventSubscriber.php in core/modules/config/tests/config_collection_install_test/src/EventSubscriber.php
EventSubscriber.php in core/modules/config/tests/config_events_test/src/EventSubscriber.php
EventSubscriber.php in core/modules/config/tests/config_transformer_test/src/EventSubscriber.php
EventSubscriber.php in core/modules/config/tests/config_import_test/src/EventSubscriber.php
Fast404ExceptionHtmlSubscriber.php in core/lib/Drupal/Core/EventSubscriber/Fast404ExceptionHtmlSubscriber.php
FinalMissingContentSubscriber.php in core/lib/Drupal/Core/Config/Importer/FinalMissingContentSubscriber.php
LocaleConfigSubscriber.php in core/modules/locale/src/LocaleConfigSubscriber.php
MediaConfigSubscriber.php in core/modules/media/src/EventSubscriber/MediaConfigSubscriber.php
NodeAdminRouteSubscriber.php in core/modules/node/src/EventSubscriber/NodeAdminRouteSubscriber.php
QueryFactory.php in core/lib/Drupal/Core/Config/Entity/Query/QueryFactory.php
SystemConfigSubscriber.php in core/modules/system/src/SystemConfigSubscriber.php
TimeZoneResolver.php in core/modules/system/src/TimeZoneResolver.php
UpdateRegistry.php in core/lib/Drupal/Core/Update/UpdateRegistry.php

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