15 files declare their use of PlainTextOutput
- Attribute.php in core/
lib/ Drupal/ Core/ Template/ Attribute.php - EmailAction.php in core/
lib/ Drupal/ Core/ Action/ Plugin/ Action/ EmailAction.php - EntityResourceValidationTrait.php in core/
modules/ rest/ src/ Plugin/ rest/ resource/ EntityResourceValidationTrait.php - FileItem.php in core/
modules/ file/ src/ Plugin/ Field/ FieldType/ FileItem.php - FileUpload.php in core/
modules/ jsonapi/ src/ Controller/ FileUpload.php - FileUploadResource.php in core/
modules/ file/ src/ Plugin/ rest/ resource/ FileUploadResource.php - FinalExceptionSubscriber.php in core/
lib/ Drupal/ Core/ EventSubscriber/ FinalExceptionSubscriber.php - MailManager.php in core/
lib/ Drupal/ Core/ Mail/ MailManager.php - OEmbed.php in core/
modules/ media/ src/ Plugin/ media/ Source/ OEmbed.php - OpenDialogCommand.php in core/
lib/ Drupal/ Core/ Ajax/ OpenDialogCommand.php - RecipeCommand.php in core/
lib/ Drupal/ Core/ Recipe/ RecipeCommand.php - SystemHooks.php in core/
modules/ system/ src/ Hook/ SystemHooks.php - Token.php in core/
lib/ Drupal/ Core/ Utility/ Token.php - UnprocessableHttpEntityExceptionNormalizer.php in core/
modules/ jsonapi/ src/ Normalizer/ UnprocessableHttpEntityExceptionNormalizer.php - UserHooks.php in core/
modules/ user/ src/ Hook/ UserHooks.php