> 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/2016/12/09.md).

# 09

![](https://385430918-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M8iFCzaIpXf8zXqpE6I%2F-MGlxYcF9oWtztTCAkcK%2F-MGlx_v3NxZ0El3VlKdG%2Fimage.png?alt=media\&token=0d1e7f0b-43b2-477e-8745-d9b4e452a7ab)