22 files declare their use of AnnotatedClassDiscovery

ActionManager.php in drupal/core/lib/Drupal/Core/Action/ActionManager.php
Contains \Drupal\Core\Action\ActionManager.
AggregatorPluginManager.php in drupal/core/modules/aggregator/lib/Drupal/aggregator/Plugin/AggregatorPluginManager.php
Contains \Drupal\aggregator\Plugin\AggregatorPluginManager.
AnnotatedClassDiscoveryTest.php in drupal/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/AnnotatedClassDiscoveryTest.php
Definition of Drupal\system\Tests\Plugin\Discovery\AnnotatedClassDiscoveryTest.
ArchiverManager.php in drupal/core/lib/Drupal/Core/Archiver/ArchiverManager.php
BlockManager.php in drupal/core/modules/block/lib/Drupal/block/Plugin/Type/BlockManager.php
CKEditorPluginManager.php in drupal/core/modules/ckeditor/lib/Drupal/ckeditor/CKEditorPluginManager.php
Contains \Drupal\ckeditor\CKEditorPluginManager.
ConditionManager.php in drupal/core/lib/Drupal/Core/Condition/ConditionManager.php
Contains \Drupal\Core\Condition\ConditionManager.
ConstraintManager.php in drupal/core/lib/Drupal/Core/Validation/ConstraintManager.php
Contains \Drupal\Core\Validation\ConstraintManager.
CustomAnnotationClassDiscoveryTest.php in drupal/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/CustomAnnotationClassDiscoveryTest.php
Contains \Drupal\system\Tests\Plugin\Discovery\CustomAnnotationClassDiscoveryTest.
EditorManager.php in drupal/core/modules/editor/lib/Drupal/editor/Plugin/EditorManager.php
Contains \Drupal\editor\Plugin\InPlaceEditorManager.
EntityManager.php in drupal/core/lib/Drupal/Core/Entity/EntityManager.php
Contains \Drupal\Core\Entity\EntityManager.
FilterPluginManager.php in drupal/core/modules/filter/lib/Drupal/filter/FilterPluginManager.php
Contains \Drupal\filter\FilterPluginManager.
FormatterPluginManager.php in drupal/core/modules/field/lib/Drupal/field/Plugin/Type/Formatter/FormatterPluginManager.php
Definition of Drupal\field\Plugin\Type\Formatter\FormatterPluginManager..
ImageToolkitManager.php in drupal/core/modules/system/lib/Drupal/system/Plugin/ImageToolkitManager.php
Contains \Drupal\system\Plugin\ImageToolkitManager.
InPlaceEditorManager.php in drupal/core/modules/edit/lib/Drupal/edit/Plugin/InPlaceEditorManager.php
Contains \Drupal\edit\Plugin\InPlaceEditorManager.
LayoutManager.php in drupal/core/modules/layout/lib/Drupal/layout/Plugin/Type/LayoutManager.php
Definition of Drupal\layout\Plugin\Type\LayoutManager.
PluginUIManager.php in drupal/core/modules/system/lib/Drupal/system/Plugin/Type/PluginUIManager.php
Contains \Drupal\system\Plugin\Type\PluginUIManager.
ResourcePluginManager.php in drupal/core/modules/rest/lib/Drupal/rest/Plugin/Type/ResourcePluginManager.php
Definition of Drupal\rest\Plugin\Type\ResourcePluginManager.
SelectionPluginManager.php in drupal/core/modules/entity_reference/lib/Drupal/entity_reference/Plugin/Type/SelectionPluginManager.php
Contains \Drupal\entity_reference\Plugin\Type\SelectionPluginManager.
TipPluginManager.php in drupal/core/modules/tour/lib/Drupal/tour/TipPluginManager.php
Contains \Drupal\tour\TipPluginManager.
ViewsPluginManager.php in drupal/core/modules/views/lib/Drupal/views/Plugin/ViewsPluginManager.php
Contains \Drupal\views\Plugin\ViewsPluginManager.
WidgetPluginManager.php in drupal/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetPluginManager.php
Definition of Drupal\field\Plugin\Type\Widget\WidgetPluginManager.