# File lib/xml/dom/visitor.rb, line 162
      def each
        sibstack = []
        siblings = [ self ]
        while true
          if siblings.length == 0
            break if sibstack.length == 0
            siblings = sibstack.pop
            next
          end
          node = siblings.shift
          yield(node)
          children = node.childNodes
          if !children.nil?
            sibstack.push(siblings)
            siblings = children.to_a.dup
          end
        end
      end