Kohana 2 ORM - created_at & updated_at

Question

I know it's possible in KO3 via

protected $_updated_column = array('
       column' => 'updated_at', 
       'format' => 'Y-m-d H:i:s
    ');

any way to do created_at and updated_at in the model on save (Kohana 2.3.4 ORM)?