content: import React from 'react';
  import { Router, Route, IndexRoute} from 'react-router';
  
  import Layout from './components/Layout';
  import DataGrid from './components/DataGrid';
  
  export default function (history) {
      return (<Router history={history}>
          <Route path="/" component={Layout}>
              <IndexRoute component={DataGrid} />
          </Route>
      </Router>);
  }