# File lib/multi_xml.rb, line 56
    def default_parser
      return :libxml if defined?(::LibXML)
      return :nokogiri if defined?(::Nokogiri)
      return :ox if defined?(::Ox)

      REQUIREMENT_MAP.each do |(library, parser)|
        begin
          require library
          return parser
        rescue LoadError
          next
        end
      end
    end