ant-design/components/radio/index.tsx

import InternalRadio from './radio';
import Group from './group';
import Button from './radioButton';
import { RadioProps } from './interface';

export * from './interface';
interface CompoundedComponent
  extends React.ForwardRefExoticComponent<RadioProps & React.RefAttributes<HTMLElement>> {
  Group: typeof Group;
  Button: typeof Button;
}

const Radio = InternalRadio as CompoundedComponent;
Radio.Button = Button;
Radio.Group = Group;
export { Button, Group };
export default Radio;