27 files declare their use of PluginInspectionInterface in Zircon Profile 8

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

Contains \Drupal\Core\Action\ActionInterface.

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

Contains \Drupal\Core\Block\BlockPluginInterface.

CKEditorPluginInterface.php in core/modules/ckeditor/src/CKEditorPluginInterface.php

Contains \Drupal\ckeditor\CKEditorPluginInterface.

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

Contains \Drupal\Core\Condition\ConditionInterface.

EditorPluginInterface.php in core/modules/editor/src/Plugin/EditorPluginInterface.php

Contains \Drupal\editor\Plugin\EditorPluginInterface.

ElementInterface.php in core/lib/Drupal/Core/Render/Element/ElementInterface.php

Contains \Drupal\Core\Render\Element\ElementInterface.

FilterFormat.php in core/modules/filter/src/Entity/FilterFormat.php

Contains \Drupal\filter\Entity\FilterFormat.

FilterInterface.php in core/modules/filter/src/Plugin/FilterInterface.php

Contains \Drupal\filter\Plugin\FilterInterface.

ImageEffectInterface.php in core/modules/image/src/ImageEffectInterface.php

Contains \Drupal\image\ImageEffectInterface.

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

Contains \Drupal\Core\ImageToolkit\ImageToolkitInterface.

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

Contains \Drupal\Core\ImageToolkit\ImageToolkitOperationInterface.

InPlaceEditorInterface.php in core/modules/quickedit/src/Plugin/InPlaceEditorInterface.php

Contains \Drupal\quickedit\Plugin\InPlaceEditorInterface.

MenuLinkInterface.php in core/lib/Drupal/Core/Menu/MenuLinkInterface.php

Contains \Drupal\Core\Menu\MenuLinkInterface.

MigrateCckFieldInterface.php in core/modules/migrate_drupal/src/Plugin/MigrateCckFieldInterface.php

Contains \Drupal\migrate_drupal\Plugin\MigrateCckFieldInterface.

MigrateDestinationInterface.php in core/modules/migrate/src/Plugin/MigrateDestinationInterface.php

Contains \Drupal\migrate\Plugin\MigrateDestinationInterface.

MigrateIdMapInterface.php in core/modules/migrate/src/Plugin/MigrateIdMapInterface.php

Contains \Drupal\migrate\Plugin\MigrateIdMapInterface.

MigrateProcessInterface.php in core/modules/migrate/src/Plugin/MigrateProcessInterface.php

Contains \Drupal\migrate\Plugin\MigrateProcessInterface.

MigrateSourceInterface.php in core/modules/migrate/src/Plugin/MigrateSourceInterface.php

Contains \Drupal\migrate\Plugin\MigrateSourceInterface.

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

Contains \Drupal\Core\Plugin\PluginDependencyTrait.

PluginInterface.php in core/modules/views/src/Plugin/views/PluginInterface.php

Contains \Drupal\views\Plugin\views\PluginInterface.

PluginSettingsInterface.php in core/lib/Drupal/Core/Field/PluginSettingsInterface.php

Contains \Drupal\Core\Field\PluginSettingsInterface.

QueueWorkerInterface.php in core/lib/Drupal/Core/Queue/QueueWorkerInterface.php

Contains \Drupal\Core\Queue\QueueWorkerInterface.

ResourceInterface.php in core/modules/rest/src/Plugin/ResourceInterface.php

Contains \Drupal\rest\Plugin\ResourceInterface.

SearchInterface.php in core/modules/search/src/Plugin/SearchInterface.php

Contains \Drupal\search\Plugin\SearchInterface.

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

Contains \Drupal\Core\TypedData\TypedData.

VariantInterface.php in core/lib/Drupal/Core/Display/VariantInterface.php

Contains \Drupal\Core\Display\VariantInterface.

ViewsPluginInterface.php in core/modules/views/src/Plugin/views/ViewsPluginInterface.php

Contains \Drupal\views\Plugin\views\ViewsPluginInterface.