Function adapton::collection::tree_of_list_rec

pub fn tree_of_list_rec<A: Adapton, X: Hash + Clone + Debug, T: TreeT<A, X>, L: ListT<A, X>>(st: &mut A, dir_list: Dir2, list: L::List, tree: T::Tree, tree_lev: T::Lev, parent_lev: T::Lev) -> (T::Tree, L::List)