/**
  * {@inheritdoc}
  */
 public function unserialize($str)
 {
     list($this->username, $parentData) = unserialize($str);
     parent::unserialize($parentData);
 }
 /**
  * {@inheritdoc}
  */
 public function unserialize($str)
 {
     list($parentData, $this->messageKey, $this->messageData) = unserialize($str);
     parent::unserialize($parentData);
 }