override function render() {
        // trace(this.props.history);
        return jsx('
        <Router history={this.props.history}>
        <ul>
        <li>
          <Link to="/">Home</Link>
        </li>
        <li>
          <Link to="/about">About</Link>
        </li>
        <li>
          <Link to="/dashboard">Dashboard</Link>
        </li>
     </ul>
     <hr />

     <Switch>
        <Route exact path="/">
          <Overview />
        </Route>
        <Route path="/about">
          <SystemLogs />
        </Route>
     </Switch>     
        </Router>