protected function checkIOSStatus($ios)
    {
        $this->backStatusArray['ORDER_STATUS'] = (isset($ios->status['ORDER_STATUS'])) ? $ios->status['ORDER_STATUS'] : 'IOS_ERROR';
        $this->backStatusArray['PAYMETHOD'] = (isset($ios->status['PAYMETHOD'])) ? $ios->status['PAYMETHOD'] : 'N/A';
        if (in_array(trim($ios->status['ORDER_STATUS']), $this->successfulStatus)) {
            $this->backStatusArray['RESULT'] = true;
        } elseif (in_array(trim($ios->status['ORDER_STATUS']), $this->unsuccessfulStatus)) {
            $this->backStatusArray['RESULT'] = false;
            $this->errorMessage[] = 'IOS STATUS: UNSUCCESSFUL!';
        }
    }