message: typo IconChart->IconBarChart
diff: @@ -26,7 +26,7 @@ ReactDOM.render(
  <span className="nav-text">nav 3</span>
  </Menu.Item>
  <Menu.Item key="4">
  - <window.IconChart {...DEMOIconProps} />
  + <window.IconBarChart {...DEMOIconProps} />
  <span className="nav-text">nav 4</span>
  </Menu.Item>
  <Menu.Item key="5">
  