
### Block

This is generally applicable to flow layouts, or to full rows at the top and bottom of a container.

setting `block` property。

<!--start-code-->
```js
const instance = (
  <ButtonToolbar>
    <Button appearance='default' block>Block</Button>
    <Button appearance='primary' block>Block</Button>
  </ButtonToolbar>
);
ReactDOM.render(instance);
```
<!--end-code-->