# File lib/dm-serializer/xml_serializers/nokogiri.rb, line 9
        def self.root_node(doc, name, attrs = {})
          root = ::Nokogiri::XML::Node.new(name, doc)
          attrs.each do |attr_name, attr_val|
            root[attr_name] = attr_val
          end
          doc.root.nil? ? doc.root = root : doc.root << root
          root
        end