public function getPrepDetails($i = 0, $j = null) {
        if (!isset($this->itemList)){
            return false;
        }
        if (is_int($i) && isset($this->itemList[$i]['PrepDetailsList'])){
            if (is_numeric($j)) {
                return $this->itemList[$i]['PrepDetailsList'][$j];
            } else {
                return $this->itemList[$i]['PrepDetailsList'];
            }
        } else {
            return false;
        }
    }