> For the complete documentation index, see [llms.txt](https://www.oulan.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.oulan.com/2017/03/09.md).

# 09

![](https://385430918-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M8iFCzaIpXf8zXqpE6I%2F-MTV9ZkOwxgtoENMI7Ob%2F-MTV9hjJ8U6dN8cTmMQQ%2Fimage.png?alt=media\&token=69e4ba0a-295a-4020-8678-ac0c6e635ac3)