parseInformation method
Implementation
@override
String parseInformation() {
final buff = StringBuilder();
buff.write('(01)');
final initialGtinPosition = buff.length;
final firstGtinDigit =
generalDecoder.extractNumericValueFromBitArray(_headerSize, 4);
buff.write(firstGtinDigit);
encodeCompressedGtinWithoutAI(buff, _headerSize + 4, initialGtinPosition);
return generalDecoder.decodeAllCodes(buff, _headerSize + 44);
}