# File lib/selenium/client/idiomatic.rb, line 450
      def browser_xpath_library=(library_name)
        raise "library name must be :ajaxslt, :javascript-xpath, or :default"   \
            unless [:ajaxslt, 'javascript-xpath''javascript-xpath', :default].include?(library_name)
        remote_control_command "useXpathLibrary", [library_name.to_s]
      end