public function __toString()
{
if ($this->never) {
$message = 'Never';
} else {
$seconds = $this->getLdapValue() / self::UNIT[self::SECONDS];
$dtBase = new \DateTime('@0');
$dtSeconds = new \DateTime('@' . $seconds);
$message = $dtBase->diff($dtSeconds)->format('%a day(s) %h hour(s) %i minute(s) %s second(s)');
}
return $message;
}