Doctree.Headingsval fold : ('a -> Types.Heading.t -> 'a) -> 'a -> Types.Page.t -> 'aFold over every headings, follow subpages, nested documentedsrc and expansions.
val foldmap : ('a -> Types.Heading.t -> 'a * Types.Heading.t) -> 'a -> Types.Page.t -> 'a * Types.Page.t