allout-hide-current-subtree is an interactive compiled Lisp function in `allout.el'.

(allout-hide-current-subtree &optional JUST-CLOSE)

Close the current topic, or containing topic if this one is already closed.

If this topic is closed and it's a top level topic, close this topic
and its siblings.

If optional arg JUST-CLOSE is non-nil, do not close the parent or
siblings, even if the target topic is already closed.