protected function setBrandField()
    {
        $sBrandID = array_get($this->arImportData, 'brand_id');
        if ($sBrandID === null) {
            return;
        }

        //Find brand by external ID
        $obBrand = Brand::getByExternalID($sBrandID)->first();
        if (empty($obBrand)) {
            $this->arImportData['brand_id'] = null;
        } else {
            $this->arImportData['brand_id'] = $obBrand->id;
        }
    }