# File lib/libxml/error.rb, line 47
      def domain_to_s
        const_map = Hash.new
        domains = self.class.constants.grep(/XML_FROM/)
        domains.each do |domain|
          human_name = domain.gsub(/XML_FROM_/, '')
          const_map[self.class.const_get(domain)] = human_name
        end

        const_map[self.domain]
      end