protected static function configureLoaders()
{
static::$spreadsheetLoader->addLoader(Xlsx\XlsxParser::FORMAT_NAME, Xlsx\XlsxParser::getSpreadsheetLoader())->addLoader(Xlsx\XlsxParser::MACRO_FORMAT_NAME, Xlsx\XlsxParser::getSpreadsheetLoader())->addLoader(Csv\CsvParser::FORMAT_NAME, Csv\CsvParser::getSpreadsheetLoader());
}