function Radio() {
	    (0, _classCallCheck3['default'])(this, Radio);
	    return (0, _possibleConstructorReturn3['default'])(this, _React$Component.apply(this, arguments));
	  }
Attaches a ref to the `<input>` element. Only functions can be used here.

```js
<Radio inputRef={ref => { this.input = ref; }} />
```