BlockThemeDeprecationTest.php in core/modules/block/tests/src/Unit/Plugin/migrate/process/BlockThemeDeprecationTest.php
ConfigCRUDTest.php in core/tests/Drupal/KernelTests/Core/Config/ConfigCRUDTest.php
ConfigEntityStorage.php in core/lib/Drupal/Core/Config/Entity/ConfigEntityStorage.php
ConfigEntityStorageTest.php in core/tests/Drupal/Tests/Core/Config/Entity/ConfigEntityStorageTest.php
ConfigEventsTest.php in core/tests/Drupal/KernelTests/Core/Config/ConfigEventsTest.php
ConfigFactoryTest.php in core/tests/Drupal/Tests/Core/Config/ConfigFactoryTest.php
ConfigTest.php in core/tests/Drupal/Tests/Core/Config/ConfigTest.php
ConfigTestStorage.php in core/modules/config/tests/config_test/src/ConfigTestStorage.php
ElementInterface.php in core/modules/config_translation/src/FormElement/ElementInterface.php
FieldConfigStorage.php in core/modules/field/src/FieldConfigStorage.php
FormElementBase.php in core/modules/config_translation/src/FormElement/FormElementBase.php
ImportableEntityStorageInterface.php in core/lib/Drupal/Core/Config/Entity/ImportableEntityStorageInterface.php
ListElement.php in core/modules/config_translation/src/FormElement/ListElement.php
PluralVariants.php in core/modules/config_translation/src/FormElement/PluralVariants.php
TestLocalActionWithConfig.php in core/modules/system/tests/modules/menu_test/src/Plugin/Menu/LocalAction/TestLocalActionWithConfig.php
theme.inc in core/includes/theme.inc
The theme system, which controls the output of Drupal.
UserUpdate7002.php in core/modules/user/src/Plugin/migrate/process/d6/UserUpdate7002.php