makeText method
Stream the text operations required to draw the barcode texts. This is automatically called by make
Implementation
@override
Iterable<BarcodeElement> makeText(
  String data,
  double width,
  double height,
  double fontHeight,
  double textPadding,
  double lineWidth,
) {
  if (printStartStop && !explicitStartStop) {
    data =
        String.fromCharCode(start.index + 0x41) +
        data +
        String.fromCharCode(stop.index + 0x41);
  } else if (!printStartStop && explicitStartStop) {
    data = data.substring(1, data.length - 1);
  }
  return super.makeText(
    data,
    width,
    height,
    fontHeight,
    textPadding,
    lineWidth,
  );
}