8 files declare their use of AnnotatedClassDiscovery in Drupal 9

AnnotatedClassDiscoveryAutomatedProviders.php in core/modules/migrate/src/Plugin/Discovery/AnnotatedClassDiscoveryAutomatedProviders.php

AnnotatedClassDiscoveryTest.php in core/tests/Drupal/KernelTests/Core/Plugin/Discovery/AnnotatedClassDiscoveryTest.php

CustomAnnotationClassDiscoveryTest.php in core/tests/Drupal/KernelTests/Core/Plugin/Discovery/CustomAnnotationClassDiscoveryTest.php

CustomDirectoryAnnotatedClassDiscoveryTest.php in core/tests/Drupal/KernelTests/Core/Plugin/Discovery/CustomDirectoryAnnotatedClassDiscoveryTest.php

DefaultPluginManager.php in core/lib/Drupal/Core/Plugin/DefaultPluginManager.php

EntityTypeManager.php in core/lib/Drupal/Core/Entity/EntityTypeManager.php

LayoutPluginManager.php in core/lib/Drupal/Core/Layout/LayoutPluginManager.php

MigrateFieldPluginManagerTest.php in core/modules/migrate_drupal/tests/src/Unit/MigrateFieldPluginManagerTest.php