I am getting this error "The instance member 'widget' can't be accessed in an initializer." Flutter/Dart

This is my code :

import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';

class viewLossEvent extends StatefulWidget {
  String code,
      
  viewLossEvent(
      {this.code});

  @override
  State<viewLossEvent> createState() => _viewLossEventState();
}

class _viewLossEventState extends State<viewLossEvent> {

  int _selectedIndex = 0;

  void _navigateBottomBar(int index){
    setState(() {
      _selectedIndex = index;
    });
  }

  final List<Widget> _pages = [
    Container(
      child: Text(
          '${widget.code}'
      ),
    ),
  ];

the error that I am getting :

"The instance member 'widget' can't be accessed in an initializer."

I am getting the error right here :

can anyone help solve this and kindly explain why this is happening.

Thank You!

>Solution :

You cannot initialize a property by using widget.code. You should use initState instead :

List<Widget> _pages = [];

void initState() {
  super.initState();
  _pages = [
    Container(
      child: Text(
          '${widget.code}'
      ),
    ),
  ];
}