example in readme not working. about dazzle HOT 1 OPEN

class App extends Component {
  constructor() {
    super(); // this is missing in the docs
    this.state = {      
      widgets: {
        WordCounter: {
          type: CounterWidget,
          title: 'Counter widget',
        }
      },
      layout: {
        rows: [{
          columns: [{
            className: 'col-md-12',
            widgets: [{key: 'WordCounter'}],
          }],
        }],
      }
    };
  }

  render() {
    return <Dashboard  widgets={this.state.widgets} layout={this.state.layout}  />
  }
}