class ActionView::Digestor::Node

def dependency_digest(finder, stack)
  children.map do |node|
    if stack.include?(node)
      false
    else
      finder.digest_cache[node.name] ||= begin
                                           stack.push node
                                           node.digest(finder, stack).tap { stack.pop }
                                         end
    end
  end.join("-")
end