public StatusMessages::getInfo()
Generate the placeholder in a #pre_render callback, because the hash salt needs to be accessed, which may not yet be available when this is called.
Overrides ElementInterface::getInfo
File
core/lib/Drupal/Core/Render/Element/StatusMessages.php, line 27
Class
StatusMessages Provides a messages element.
Namespace
Drupal\Core\Render\Element
Code
public function getInfo() {
return [
// May have a value of 'status' or 'error' when only displaying mess