Issue::setLastModified PHP Method

    function setLastModified($lastModified)
    {
        return $this->setData('lastModified', $lastModified);
    }

 /**
  * creates and returns an issue object from a row
  * @param $row array
  * @return Issue object
  */
 function &_returnIssueFromRow($row)
 {
     $issue = new Issue();
     $issue->setId($row['issue_id']);
     $issue->setJournalId($row['journal_id']);
     $issue->setVolume($row['volume']);
     $issue->setNumber($row['number']);
     $issue->setYear($row['year']);
     $issue->setPublished($row['published']);
     $issue->setCurrent($row['current']);
     $issue->setDatePublished($this->datetimeFromDB($row['date_published']));
     $issue->setDateNotified($this->datetimeFromDB($row['date_notified']));
     $issue->setLastModified($this->datetimeFromDB($row['last_modified']));
     $issue->setAccessStatus($row['access_status']);
     $issue->setOpenAccessDate($this->datetimeFromDB($row['open_access_date']));
     $issue->setShowVolume($row['show_volume']);
     $issue->setShowNumber($row['show_number']);
     $issue->setShowYear($row['show_year']);
     $issue->setShowTitle($row['show_title']);
     $issue->setStyleFileName($row['style_file_name']);
     $issue->setOriginalStyleFileName($row['original_style_file_name']);
     $this->getDataObjectSettings('issue_settings', 'issue_id', $row['issue_id'], $issue);
     HookRegistry::call('IssueDAO::_returnIssueFromRow', array(&$issue, &$row));
     return $issue;
 }