protected function isAllHeadingValuesPresentInRow(?array $row){

        if (true === empty($row)) {
            return false;
        }

        foreach($this->targettedHeadingValues as $headerValue){

            if (false === in_array(trim($headerValue), $row)) {
                //print($headerValue . ' not in ' . print_r($row,true));
                return false;
            }

        }

        return true;
    }