Chris@14: <?php
Chris@14: 
Chris@14: namespace Drupal\Core\Messenger;
Chris@14: 
Chris@14: /**
Chris@14:  * Provides a trait for the messenger service.
Chris@14:  */
Chris@14: trait MessengerTrait {
Chris@14: 
Chris@14:   /**
Chris@14:    * The messenger.
Chris@14:    *
Chris@14:    * @var \Drupal\Core\Messenger\MessengerInterface
Chris@14:    */
Chris@14:   protected $messenger;
Chris@14: 
Chris@14:   /**
Chris@14:    * Sets the messenger.
Chris@14:    *
Chris@14:    * @param \Drupal\Core\Messenger\MessengerInterface $messenger
Chris@14:    *   The messenger.
Chris@14:    */
Chris@14:   public function setMessenger(MessengerInterface $messenger) {
Chris@14:     $this->messenger = $messenger;
Chris@14:   }
Chris@14: 
Chris@14:   /**
Chris@14:    * Gets the messenger.
Chris@14:    *
Chris@14:    * @return \Drupal\Core\Messenger\MessengerInterface
Chris@14:    *   The messenger.
Chris@14:    */
Chris@14:   public function messenger() {
Chris@14:     if (!isset($this->messenger)) {
Chris@14:       $this->messenger = \Drupal::messenger();
Chris@14:     }
Chris@14:     return $this->messenger;
Chris@14:   }
Chris@14: 
Chris@14: }