public function url($action = null)
{
if (empty($action)) {
return parent::url();
} else {
if ($action == 'edit') {
return panel()->urls()->index() . '/options';
} else {
if ($action == 'preview') {
return parent::url();
} else {
if ($this->multilang() and in_array($action, $this->languages()->codes())) {
return parent::url($action);
} else {
return panel()->urls()->index() . '/' . $this->uri($action);
}
}
}
}
}