printBarcode method
Prints a barcode with optional SunmiBarcodeStyle.
text: The barcode content.
style: Optional style for the barcode.
Returns a String indicating the result or null if unsuccessful.
Implementation
Future<String?> printBarcode(String text, {SunmiBarcodeStyle? style}) async {
return await SunmiPrinter.printBarCode(text, style: style);
}