# File lib/active_resource/base.rb, line 540
      def exists?(id, options = {})
        if id
          prefix_options, query_options = split_options(options[:params])
          path = element_path(id, prefix_options, query_options)
          response = connection.head(path, headers)
          response.code.to_i == 200
        end
        # id && !find_single(id, options).nil?
      rescue ActiveResource::ResourceNotFound
        false
      end