NodesController::admin_delete_meta PHP Method

    public function admin_delete_meta($id = null)
    {
        $success = false;
        $Node = $this->{$this->modelClass};
        if ($id != null && $Node->Meta->delete($id)) {
            $success = true;
        } else {
            if (!$Node->Meta->exists($id)) {
                $success = true;
            }
        }
        $success = array('success' => $success);
        $this->set(compact('success'));
        $this->set('_serialize', 'success');
    }