code: def update_nodes(nodes)
        old = dup
        replace(nodes)
        each do |node|
          begin
            if (i = old.find_node_index(node.name))
              node.stats = old[i].stats
              node.last  = old[i].last
            end
          rescue Oxidized::NodeNotFound # rubocop:disable Lint/HandleExceptions
          end
        end
        sort_by! { |x| x.last.nil? ? Time.new(0) : x.last.end }
      end
docs: walks list of new nodes, if old node contains same name, adds last and
   stats information from old to new.
  
   @todo can we trust name to be unique identifier, what about when groups are used?
   @param [Array] nodes Array of nodes used to replace+update old