我可以在Flutter Bottom导航栏中的图标周围添加间距吗？

BottomNavigationBar(
  items: [
    BottomNavigationBarItem(
      icon: Icon(Icons.home),
      label: 'Home',
    ),
    BottomNavigationBarItem(
      icon: Container(
        padding: EdgeInsets.all(8.0), // 设置间距
        child: Icon(Icons.business),
      ),
      label: 'Business',
    ),
    BottomNavigationBarItem(
      icon: Icon(Icons.school),
      label: 'School',
    ),
  ],
)

BottomNavigationBar(
  items: [
    BottomNavigationBarItem(
      icon: InkWell(
        onTap: () {},
        child: Padding(
          padding: EdgeInsets.all(8.0), // 设置间距
          child: Icon(Icons.home),
        ),
      ),
      label: 'Home',
    ),
    BottomNavigationBarItem(
      icon: InkWell(
        onTap: () {},
        child: Padding(
          padding: EdgeInsets.all(8.0), // 设置间距
          child: Icon(Icons.business),
        ),
      ),
      label: 'Business',
    ),
    BottomNavigationBarItem(
      icon: Icon(Icons.school),
      label: 'School',
    ),
  ],
)

BottomNavigationBar(
  items: [
    BottomNavigationBarItem(
      icon: CustomIcon(Icons.home),
      label: 'Home',
    ),
    BottomNavigationBarItem(
      icon: CustomIcon(Icons.business),
      label: 'Business',
    ),
    BottomNavigationBarItem(
      icon: Icon(Icons.school),
      label: 'School',
    ),
  ],
)

class CustomIcon extends StatelessWidget {
  final IconData iconData;
  final double size;

  CustomIcon(this.iconData, {this.size = 24.0});

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: EdgeInsets.all(8.0), // 设置间距
      child: Icon(iconData, size: size),
    );
  }
}