33 files declare their use of Plugin in Zircon Profile 8.0

Action.php in core/lib/Drupal/Core/Annotation/Action.php

Contains \Drupal\Core\Annotation\Action.

AggregatorFetcher.php in core/modules/aggregator/src/Annotation/AggregatorFetcher.php

Contains \Drupal\aggregator\Annotation\AggregatorFetcher.

AggregatorParser.php in core/modules/aggregator/src/Annotation/AggregatorParser.php

Contains \Drupal\aggregator\Annotation\AggregatorParser.

AggregatorProcessor.php in core/modules/aggregator/src/Annotation/AggregatorProcessor.php

Contains \Drupal\aggregator\Annotation\AggregatorProcessor.

Archiver.php in core/lib/Drupal/Core/Archiver/Annotation/Archiver.php

Contains \Drupal\Core\Archiver\Annotation\Archiver.

Block.php in core/lib/Drupal/Core/Block/Annotation/Block.php

Contains \Drupal\Core\Block\Annotation\Block.

CKEditorPlugin.php in core/modules/ckeditor/src/Annotation/CKEditorPlugin.php

Contains \Drupal\ckeditor\Annotation\CKEditorPlugin.

Condition.php in core/lib/Drupal/Core/Condition/Annotation/Condition.php

Contains \Drupal\Core\Condition\Annotation\Condition.

Constraint.php in core/lib/Drupal/Core/Validation/Annotation/Constraint.php

Contains \Drupal\Core\Validation\Annotation\Constraint.

ContextDefinition.php in core/lib/Drupal/Core/Annotation/ContextDefinition.php

Contains \Drupal\Core\Annotation\ContextDefinition.

DataType.php in core/lib/Drupal/Core/TypedData/Annotation/DataType.php

Contains \Drupal\Core\TypedData\Annotation\DataType.

DisplayVariant.php in core/lib/Drupal/Core/Display/Annotation/DisplayVariant.php

Contains \Drupal\Core\Display\Annotation\DisplayVariant.

Editor.php in core/modules/editor/src/Annotation/Editor.php

Contains \Drupal\editor\Annotation\Editor.

EntityReferenceSelection.php in core/lib/Drupal/Core/Entity/Annotation/EntityReferenceSelection.php

Contains \Drupal\Core\Entity\Annotation\EntityReferenceSelection.

EntityType.php in core/lib/Drupal/Core/Entity/Annotation/EntityType.php

Contains \Drupal\Core\Entity\Annotation\EntityType.

FieldFormatter.php in core/lib/Drupal/Core/Field/Annotation/FieldFormatter.php

Contains \Drupal\Core\Field\Annotation\FieldFormatter.

FieldWidget.php in core/lib/Drupal/Core/Field/Annotation/FieldWidget.php

Contains \Drupal\Core\Field\Annotation\FieldWidget.

Filter.php in core/modules/filter/src/Annotation/Filter.php

Contains \Drupal\filter\Annotation\Filter.

ImageEffect.php in core/modules/image/src/Annotation/ImageEffect.php

Contains \Drupal\image\Annotation\ImageEffect.

ImageToolkit.php in core/lib/Drupal/Core/ImageToolkit/Annotation/ImageToolkit.php

Contains \Drupal\Core\ImageToolkit\Annotation\ImageToolkit.

ImageToolkitOperation.php in core/lib/Drupal/Core/ImageToolkit/Annotation/ImageToolkitOperation.php

Contains \Drupal\Core\ImageToolkit\Annotation\ImageToolkitOperation.

InPlaceEditor.php in core/modules/quickedit/src/Annotation/InPlaceEditor.php

Contains \Drupal\quickedit\Annotation\InPlaceEditor.

LanguageNegotiation.php in core/modules/language/src/Annotation/LanguageNegotiation.php

Contains \Drupal\language\Annotation\LanguageNegotiation.

Mail.php in core/lib/Drupal/Core/Annotation/Mail.php

Contains \Drupal\Core\Annotation\Mail.

MigrateCckField.php in core/modules/migrate_drupal/src/Annotation/MigrateCckField.php

Contains \Drupal\migrate_drupal\Annotation\MigrateCckField.

MigrateDestination.php in core/modules/migrate/src/Annotation/MigrateDestination.php

Contains \Drupal\migrate\Annotation\MigrateDestination.

MigrateProcessPlugin.php in core/modules/migrate/src/Annotation/MigrateProcessPlugin.php

Contains \Drupal\migrate\Annotation\MigrateProcessPlugin.

MigrateSource.php in core/modules/migrate/src/Annotation/MigrateSource.php

Contains \Drupal\migrate\Annotation\MigrateSource.

QueueWorker.php in core/lib/Drupal/Core/Annotation/QueueWorker.php

Contains \Drupal\Core\Annotation\QueueWorker.

RestResource.php in core/modules/rest/src/Annotation/RestResource.php

Contains \Drupal\rest\Annotation\RestResource.

SearchPlugin.php in core/modules/search/src/Annotation/SearchPlugin.php

Contains \Drupal\search\Annotation\SearchPlugin.

Tip.php in core/modules/tour/src/Annotation/Tip.php

Contains \Drupal\tour\Annotation\Tip.

ViewsPluginAnnotationBase.php in core/modules/views/src/Annotation/ViewsPluginAnnotationBase.php

Contains \Drupal\views\Annotation\ViewsPluginAnnotationBase.