如何在颤动中自定义Arrow Back高度和宽度

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Custom Arrow Back'),
          leading: IconButton(
            icon: Icon(Icons.arrow_back),
            onPressed: () {
              Navigator.of(context).pop();
            },
            iconSize: 30.0, // 自定义图标大小
          ),
        ),
        body: Center(
          child: Text('Hello World'),
        ),
      ),
    );
  }
}

leading: IconButton(
  icon: Icon(Icons.arrow_back, color: Colors.red, size: 30.0),
  onPressed: () {
    Navigator.of(context).pop();
  },
),