https://api.drupal.org/api/drupal/core%21modules%21inline_form_errors%21tests%21src%21FunctionalJavascript%21FormErrorHandlerCKEditor5Test.php/function/FormErrorHandlerCKEditor5Test%3A%3AsetUp/11.x
function FormErrorHandlerCKEditor5Test::setUp | Drupal API
functionsetupdrupalapi