如何删除或更改flutter_bootstrap列之间的间距

import 'package:flutter_bootstrap/flutter_bootstrap.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return BootstrapStyleSheet(
      child: MaterialApp(
        home: Scaffold(
          body: Container(
            padding: EdgeInsets.all(20),
            child: BootstrapRow(
              children: [
                BootstrapCol(
                  sizes: 'col-12 col-md-6',
                  child: Container(
                    color: Colors.red,
                    height: 100,
                  ),
                ),
                BootstrapCol(
                  sizes: 'col-12 col-md-6',
                  child: Container(
                    color: Colors.blue,
                    height: 100,
                  ),
                ),
              ],
              gutters: Gutters(
                xs: 0, // 设置为0以删除间距
                sm: 0,
                md: 0,
                lg: 0,
                xl: 0,
              ),
            ),
          ),
        ),
      ),
    );
  }
}

import 'package:flutter/material.dart';

class CustomGutter extends StatelessWidget {
  final double width;

  CustomGutter({this.width = 10});

  @override
  Widget build(BuildContext context) {
    return SizedBox(width: width);
  }
}

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Container(
          padding: EdgeInsets.all(20),
          child: Row(
            children: [
              Container(
                color: Colors.red,
                height: 100,
                width: MediaQuery.of(context).size.width / 2 - 10,
              ),
              CustomGutter(width: 0), // 使用自定义间距组件
              Container(
                color: Colors.blue,
                height: 100,
                width: MediaQuery.of(context).size.width / 2 - 10,
              ),
            ],
          ),
        ),
      ),
    );
  }
}