warning when define member in widget

[zzc-tongji]

Here is my code.

import 'package:flutter/material.dart';

class Home extends StatelessWidget {
  Map _parameters;

  Home([Map params]) {
    _parameters = params;
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Home'),
      ),
      body: Center(
        child: Column(
          children: [
            Text(_parameters.toString()),
          ],
        ),
      ),
    );
  }
}

IDE says that there is a warning.

info: This class (or a class which this class inherits from) is marked as '@immutable', but one or more of its instance fields are not final: Home._parameters (must_be_immutable at [hello_flutter_boost] lib/page/home.dart:6)

Here is a problem. I have to define _parameters to store parameter from Home() (constructor) so the widget can get parameters from outside. But it causes a warning.

Is there any way to avoid the warning?

[zzc-tongji]

Answer is here:

https://stackoverflow.com/questions/57193022/how-to-avoid-warning-when-defining-member-in-widget

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.