How to show and customize the week number in the Flutter Calendar (SfCalendar)

import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:syncfusion_flutter_calendar/calendar.dart';
 
void main() => runApp(const WeekNumber());
 
class WeekNumber extends StatefulWidget {
  const WeekNumber({Key? key}) : super(key: key);
 
  @override
  State<StatefulWidget> createState() => WeekNumberCustomization();
}
 
class WeekNumberCustomization extends State<WeekNumber> {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
          body: SafeArea(
        child: SfCalendar(
          showWeekNumber: true,
          view: CalendarView.month,
          allowedViews: const[
            CalendarView.day,
            CalendarView.week,
            CalendarView.workWeek,
            CalendarView.month,
            CalendarView.timelineDay,
            CalendarView.timelineWeek,
            CalendarView.timelineWorkWeek,
            CalendarView.timelineMonth
          ],
          weekNumberStyle: const WeekNumberStyle(
              textStyle: TextStyle(color: Colors.amber),
              backgroundColor: Color(0xFFDF5E5E)),
        ),
      )),
    );
  }
}