org-check-for-hidden
org-check-for-hidden is a compiled Lisp function in `org.el
'.
(org-check-for-hidden WHAT)
Check if there are hidden headlines/items in the current visual line.
WHAT can be either `headlines' or `items'. If the current line is
an outline or item heading and it has a folded subtree below it,
this function returns t, nil otherwise.