ant-design-vue/components/radio/index.js

import Radio from './Radio'
import Group from './Group'
import Button from './RadioButton'

Radio.Group = Group
Radio.Button = Button

/* istanbul ignore next */
Radio.install = function (Vue) {
  Vue.component(Radio.name, Radio)
  Vue.component(Radio.Group.name, Radio.Group)
  Vue.component(Radio.Button.name, Radio.Button)
}

export { Button, Group }
export default Radio