private function _set_stash_cookie($unique_id)
{
$cookie_data = serialize(array('id' => $unique_id, 'dt' => $this->EE->localize->now));
if (version_compare(APP_VER, '2.8', '>=')) {
$this->EE->input->set_cookie($this->stash_cookie, $cookie_data, $this->stash_cookie_expire);
} else {
$this->EE->functions->set_cookie($this->stash_cookie, $cookie_data, $this->stash_cookie_expire);
}
}