/**
  * Construct a new notification message
  *
  * @param string $title
  * @param string $content
  * @param string $class (Optional) Defaults to NotificationMessage::MESSAGE
  *
  * @return void
  **/
 public function __construct($title, $content, $class = self::INFO)
 {
     $this->title = NotificationMessage::styleAlertLinks($title);
     $this->content = NotificationMessage::styleAlertLinks($content);
     $this->class = $class;
 }