45 files declare their use of PluginNotFoundException

ContentModerationConfigureEntityTypesForm.php in core/modules/content_moderation/src/Form/ContentModerationConfigureEntityTypesForm.php
ContentModerationStateResourceTest.php in core/modules/content_moderation/tests/src/Kernel/ContentModerationStateResourceTest.php
DefaultLazyPluginCollection.php in core/lib/Drupal/Core/Plugin/DefaultLazyPluginCollection.php
DefaultLazyPluginCollectionTest.php in core/tests/Drupal/Tests/Core/Plugin/DefaultLazyPluginCollectionTest.php
DefaultPluginManagerTest.php in core/tests/Drupal/Tests/Core/Plugin/DefaultPluginManagerTest.php
DiscoveryTrait.php in core/lib/Drupal/Component/Plugin/Discovery/DiscoveryTrait.php
DiscoveryTraitTest.php in core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryTraitTest.php
Editor.php in core/modules/editor/src/Entity/Editor.php
EntityConverterTest.php in core/tests/Drupal/Tests/Core/ParamConverter/EntityConverterTest.php
EntityDefinitionUpdateTest.php in core/tests/Drupal/KernelTests/Core/Entity/EntityDefinitionUpdateTest.php
EntityDeriverTest.php in core/tests/Drupal/KernelTests/Core/Entity/EntityDeriverTest.php
EntityFieldManagerTest.php in core/tests/Drupal/Tests/Core/Entity/EntityFieldManagerTest.php
Contains \Drupal\Tests\Core\Entity\EntityFieldManagerTest.
EntityImageStyle.php in core/modules/image/src/Plugin/migrate/destination/EntityImageStyle.php
EntityQueryRelationshipTest.php in core/tests/Drupal/KernelTests/Core/Entity/EntityQueryRelationshipTest.php
EntityTypeBundleInfoTest.php in core/tests/Drupal/Tests/Core/Entity/EntityTypeBundleInfoTest.php
EntityTypeManager.php in core/lib/Drupal/Core/Entity/EntityTypeManager.php
EntityTypeManagerTest.php in core/tests/Drupal/Tests/Core/Entity/EntityTypeManagerTest.php
Contains \Drupal\Tests\Core\Entity\EntityTypeManagerTest.
EntityTypeRepositoryTest.php in core/tests/Drupal/Tests/Core/Entity/EntityTypeRepositoryTest.php
FieldConfigStorageBase.php in core/lib/Drupal/Core/Field/FieldConfigStorageBase.php
FieldDefinitionListenerTest.php in core/tests/Drupal/Tests/Core/Field/FieldDefinitionListenerTest.php
FieldDiscovery.php in core/modules/migrate_drupal/src/FieldDiscovery.php
FieldMissingTypeTest.php in core/tests/Drupal/KernelTests/Core/Field/FieldMissingTypeTest.php
FieldStorageConfigStorage.php in core/modules/field/src/FieldStorageConfigStorage.php
FieldType.php in core/modules/field/src/Plugin/migrate/process/FieldType.php
HelpTwigExtension.php in core/modules/help_topics/src/HelpTwigExtension.php
HookDiscoveryTest.php in core/tests/Drupal/Tests/Core/Plugin/Discovery/HookDiscoveryTest.php
ImageEffectFormBase.php in core/modules/image/src/Form/ImageEffectFormBase.php
ImageToolkitBase.php in core/lib/Drupal/Core/ImageToolkit/ImageToolkitBase.php
ImageToolkitOperationManager.php in core/lib/Drupal/Core/ImageToolkit/ImageToolkitOperationManager.php
JsonApiDocumentTopLevelNormalizer.php in core/modules/jsonapi/src/Normalizer/JsonApiDocumentTopLevelNormalizer.php
LanguageNegotiator.php in core/modules/language/src/LanguageNegotiator.php
LanguageNegotiatorPluginTest.php in core/modules/language/tests/src/Kernel/LanguageNegotiatorPluginTest.php
MenuLinkManager.php in core/lib/Drupal/Core/Menu/MenuLinkManager.php
MigrateFieldPluginManager.php in core/modules/migrate_drupal/src/Plugin/MigrateFieldPluginManager.php
MigrateFieldPluginManagerTest.php in core/modules/migrate_drupal/tests/src/Kernel/MigrateFieldPluginManagerTest.php
MigrateFieldPluginManagerTest.php in core/modules/migrate_drupal/tests/src/Unit/MigrateFieldPluginManagerTest.php
MigrateLookup.php in core/modules/migrate/src/MigrateLookup.php
MigrateLookupTest.php in core/modules/migrate/tests/src/Unit/MigrateLookupTest.php
MigrateStub.php in core/modules/migrate/src/MigrateStub.php
MigrateStubTest.php in core/modules/migrate/tests/src/Unit/MigrateStubTest.php
MigrationLookup.php in core/modules/migrate/src/Plugin/migrate/process/MigrationLookup.php
PluginManagerBase.php in core/lib/Drupal/Component/Plugin/PluginManagerBase.php
PluginManagerBaseTest.php in core/tests/Drupal/Tests/Component/Plugin/PluginManagerBaseTest.php
ProcessField.php in core/modules/field/src/Plugin/migrate/process/ProcessField.php
ProcessFieldTest.php in core/modules/field/tests/src/Unit/Plugin/migrate/process/ProcessFieldTest.php

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