How to display vertical text (from bottom to top) in the Flutter pdf library?

Question

`I'm using this PDF library to generate PDFs in Flutter, which has its own widget system. Im' trying to flip a text widget inside a container to a bottom to up direction and i cant user rotated box widget for that what else is the solution to achieve this adding image here

this is the code here in pdf package roatedBox is not available

this is the issue with rotated box

how to achieve this parent will be container inside text widget as child and string visitor but it should look like this.

i tried rotated box and transform but it doesnt work in pdf creation this is for a pdf printing purpose

  Future _writeIntoPdf(String? logo) async {
final pdf = pw.Document();

pdf.addPage(
  pw.Page(
    pageFormat: PdfPageFormat(160, 105),
    build: (pw.Context context) {
      return pw.Container(
          height: 105,
          width: 160,
          decoration: pw.BoxDecoration(border: pw.Border.all(width: 1.0)),
          child: pw.Row(children: [
            pw.Container(
                height: 105,
                width: 20,
                color: PdfColor.fromHex('#f72858'),
                child: pw.RotatedBox(
                  child:pw.Text(
                    'Visitor',
                    style: pw.TextStyle(
                      fontSize: 6,
                    ),) 
                  
                )),))}}