allout-redecorate-visible-subtree is a compiled Lisp function in `allout-widgets.el'.

(allout-redecorate-visible-subtree &optional PARENT-WIDGET DEPTH CHART)

Redecorate all visible items in subtree at point.

Optional PARENT-WIDGET is for optimization, when the parent
widget is already available.

Optional DEPTH restricts the excursion depth of covered.

Optional CHART is for internal recursion, to carry a chart of the
target items.

Point is left at the last sibling in the visible subtree.