As mixins are not supported in ES2015 / TypeScript syntax here is example of ES2015 ref based implementation.
Using refs is the preferred (by facebook) "escape hatch" to underlaying DOM nodes: [React: The ref Callback Attribute](https://facebook.github.io/react/docs/more-about-refs.html#the-ref-callback-attribute)
```js
import * as React from "react";
import Sortable from 'sortablejs';
export class SortableExampleEsnext extends React.Component {