27 files declare their use of PluginManagerInterface in Zircon Profile 8

BlockPluginCollection.php in core/modules/block/src/BlockPluginCollection.php

Contains \Drupal\block\BlockPluginCollection.

ConfigMapperManagerInterface.php in core/modules/config_translation/src/ConfigMapperManagerInterface.php

Contains \Drupal\config_translation\ConfigMapperManagerInterface.

ContextAwarePluginManagerInterface.php in core/lib/Drupal/Core/Plugin/Context/ContextAwarePluginManagerInterface.php

Contains \Drupal\Core\Plugin\Context\ContextAwarePluginManagerInterface.

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

Contains \Drupal\Core\Plugin\DefaultLazyPluginCollection.

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

Contains \Drupal\Core\Plugin\DefaultPluginManager.

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

Contains \Drupal\Core\Plugin\DefaultSingleLazyPluginCollection.

DisplayPluginCollection.php in core/modules/views/src/DisplayPluginCollection.php

Contains \Drupal\views\DisplayPluginCollection.

EditorSelector.php in core/modules/quickedit/src/EditorSelector.php

Contains \Drupal\quickedit\EditorSelector.

Element.php in core/modules/editor/src/Element.php

Contains \Drupal\editor\Element.

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

Contains \Drupal\Core\Entity\EntityTypeManagerInterface.

ExecutableManagerInterface.php in core/lib/Drupal/Core/Executable/ExecutableManagerInterface.php

Contains \Drupal\Core\Executable\ExecutableManagerInterface.

FieldType.php in core/modules/field/src/Plugin/migrate/process/d6/FieldType.php

Contains \Drupal\field\Plugin\migrate\process\d6\FieldType.

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

Contains \Drupal\Core\Field\FieldTypePluginManagerInterface.

FilterUninstallValidator.php in core/modules/filter/src/FilterUninstallValidator.php

Contains \Drupal\filter\FilterUninstallValidator.

HtmlRenderer.php in core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php

Contains \Drupal\Core\Render\MainContent\HtmlRenderer.

LanguageNegotiator.php in core/modules/language/src/LanguageNegotiator.php

Contains \Drupal\language\LanguageNegotiator.

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

Contains \Drupal\Core\Menu\LocalActionManagerInterface.

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

Contains \Drupal\Core\Menu\LocalTaskManagerInterface.

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

Contains \Drupal\Core\Mail\MailManagerInterface.

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

Contains \Drupal\Core\Menu\MenuLinkManagerInterface.

MetadataGenerator.php in core/modules/quickedit/src/MetadataGenerator.php

Contains \Drupal\quickedit\MetadataGenerator.

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

Contains \Drupal\Core\Queue\QueueWorkerManagerInterface.

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

Contains \Drupal\search\Plugin\SearchPluginCollection.

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

Contains \Drupal\Core\Entity\EntityReferenceSelection\SelectionPluginManagerInterface.

TestLazyPluginCollection.php in core/modules/system/tests/modules/plugin_test/src/Plugin/TestLazyPluginCollection.php

Contains \Drupal\plugin_test\Plugin\TestLazyPluginCollection.

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

Contains \Drupal\Core\TypedData\TypedDataManagerInterface.

ViewListBuilder.php in core/modules/views_ui/src/ViewListBuilder.php

Contains \Drupal\views_ui\ViewListBuilder.