有没有一种方法可以关闭cakepp中的mysql连接

Is there a way to close mysql connection in cakephp?

我知道如何在php中关闭mysql连接

<?php
$con=mysql_connect("localhost","user","password","dbname");
// ....some PHP code...
mysql_close($con);
?>

但是如何在cakehp中关闭mysql连接

$this->ModelName->getDatasource()->disconnect();