() => {
  class PagerDemo extends Component {
    state = {
      total: 750,
      currentPage: 1
    };
    render() {
      const {
        total,
        currentPage
      } = this.state;
      return <Pager total={total} currentPage={currentPage} disablePageSizeSelector onPageChange={cp => this.setState({
        currentPage: cp
      })} />;
    }
  }
  return <PagerDemo />;
}