techdivision / import-product

        }

        // query whether or not the image columns has to be cleaned-up also

        if ($this->getConfiguration()->hasParam(ConfigurationKeys::CLEAN_UP_EMPTY_IMAGE_COLUMNS) &&

            $this->getConfiguration()->getParam(ConfigurationKeys::CLEAN_UP_EMPTY_IMAGE_COLUMNS, false)

        ) {

            // if yes load the image column names

            $imageTypes = array_keys($this->getImageTypes());

            // and append them to the column names from the configuration

            foreach ($imageTypes as $imageAttribute) {

                $cleanUpColumns[] = $this->mapAttributeCodeByHeaderMapping($imageAttribute);

            }

        }

        // query whether or not the columns with the product links has to be cleaned-up also

        if ($this->getConfiguration()->hasParam(ConfigurationKeys::CLEAN_UP_LINKS) &&

        }

        // query whether or not the columns with the product links has to be cleaned-up also

        if ($this->getConfiguration()->hasParam(ConfigurationKeys::CLEAN_UP_LINKS) &&

            $this->getConfiguration()->getParam(ConfigurationKeys::CLEAN_UP_LINKS, false)

        ) {

            // load the link type mappings

            $linkTypeMappings = $this->getLinkTypeMappings();

            // prepare the links for the found link types and clean up

            foreach ($linkTypeMappings as $columns) {

                // shift the column with the header information from the stack

                list ($columnNameChildSkus, ) = array_shift($columns);

                // append the column name from the link type mapping

                $cleanUpColumns[] = $columnNameChildSkus;

            }

        }

        // return the array with the column names that has to be cleaned-up

        return $cleanUpColumns;