如何在Flutter中实现这种类型的Button？

import 'package:flutter/material.dart';

class CustomButton extends StatelessWidget {
  final String text;
  final IconData icon;
  final VoidCallback onPressed;

  const CustomButton({Key key, this.text, this.icon, this.onPressed})
      : super(key: key);

  @override
  Widget build(BuildContext context) {
    return InkWell(
      onTap: onPressed,
      child: Container(
        padding: EdgeInsets.symmetric(vertical: 10, horizontal: 20),
        decoration: BoxDecoration(
          color: Colors.blue,
          borderRadius: BorderRadius.circular(8),
        ),
        child: Row(
          mainAxisSize: MainAxisSize.min,
          children: [
            Icon(icon, color: Colors.white),
            SizedBox(width: 8),
            Text(
              text,
              style: TextStyle(color: Colors.white),
            ),
          ],
        ),
      ),
    );
  }
}

CustomButton(
  text: 'Submit',
  icon: Icons.check,
  onPressed: () {
    // 处理按钮点击事件
  },
)