/**
  * @param $a_parent_obj
  * @param string $a_parent_cmd
  * @param ilObjUser $user The user from whom the certificates are displayed
  * @param array $options
  */
 public function __construct($a_parent_obj, $a_parent_cmd = "", ilObjUser $user, array $options = array())
 {
     $this->_user = $user;
     $options['user_id'] = $user->getId();
     $options['columns'] = isset($options['columns']) ? $options['columns'] : $this->columns;
     parent::__construct($a_parent_obj, $a_parent_cmd, $options);
 }