23 files declare their use of PluginException

BlockPluginCollection.php in core/modules/block/src/BlockPluginCollection.php
BlockStorageUnitTest.php in core/modules/block/tests/src/Kernel/BlockStorageUnitTest.php
ContextualLinkManager.php in core/lib/Drupal/Core/Menu/ContextualLinkManager.php
ContextualLinkManagerTest.php in core/tests/Drupal/Tests/Core/Menu/ContextualLinkManagerTest.php
DefaultFactory.php in core/lib/Drupal/Component/Plugin/Factory/DefaultFactory.php
DefaultFactoryTest.php in core/tests/Drupal/Tests/Component/Plugin/DefaultFactoryTest.php
DefaultPluginManagerTest.php in core/tests/Drupal/Tests/Core/Plugin/DefaultPluginManagerTest.php
DisplayPluginCollection.php in core/modules/views/src/DisplayPluginCollection.php
ExecutablePluginBase.php in core/lib/Drupal/Core/Executable/ExecutablePluginBase.php
InaccessibleMenuLink.php in core/lib/Drupal/Core/Menu/InaccessibleMenuLink.php
ItemsImporter.php in core/modules/aggregator/src/ItemsImporter.php
LocalTaskManager.php in core/lib/Drupal/Core/Menu/LocalTaskManager.php
MenuLinkBase.php in core/lib/Drupal/Core/Menu/MenuLinkBase.php
MenuLinkContent.php in core/modules/menu_link_content/src/Plugin/Menu/MenuLinkContent.php
MenuLinkManager.php in core/lib/Drupal/Core/Menu/MenuLinkManager.php
MenuLinkPluginConverter.php in core/lib/Drupal/Core/ParamConverter/MenuLinkPluginConverter.php
MenuTreeStorage.php in core/lib/Drupal/Core/Menu/MenuTreeStorage.php
MenuTreeStorageTest.php in core/tests/Drupal/KernelTests/Core/Menu/MenuTreeStorageTest.php
MigrateLookup.php in core/modules/migrate/src/MigrateLookup.php
MigrateLookupTest.php in core/modules/migrate/tests/src/Unit/MigrateLookupTest.php
SectionComponent.php in core/modules/layout_builder/src/SectionComponent.php
SectionRenderTest.php in core/modules/layout_builder/tests/src/Unit/SectionRenderTest.php
TypedDataManager.php in core/lib/Drupal/Core/TypedData/TypedDataManager.php

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