可以搞一个把子目录收起来的功能（You can create a function to collect subdirectories）
complete
F
Fallen Max
complete
Feature exists
F
Fallen Max
This feature already exists. Click "-" or "+" to opt-out "auto expand" mode, then you can:
- expand/fold each heading that has sub-headings,
- use "-" or "+" to expand/fold to the same level