hs-hide-all
hs-hide-all is an interactive compiled Lisp function in `hideshow.el
'.
(hs-hide-all)
Hide all top level blocks, displaying only first and last lines.
Move point to the beginning of the line, and run the normal hook
`hs-hide-hook'. See documentation for `run-hooks'.
If `hs-hide-comments-when-hiding-all' is non-nil, also hide the comments.