protected function ApiStatus2InternalStatus($status)
    {
        switch ($status) {
            case Api::Success:
                return self::Status_Success;
            case Api::Errors:
                return self::Status_Errors;
            case Api::Warnings:
                return self::Status_Warnings;
            case Api::Exception:
            default:
                return self::Status_Exception;
        }
    }