# File lib/twitter/client/list_members.rb, line 115
      def list_add_members(*args)
        options = args.last.is_a?(Hash) ? args.pop : {}
        users_to_add, list = args.pop, args.pop
        user = args.pop || get_screen_name
        merge_list_into_options!(list, options)
        merge_owner_into_options!(user, options)
        merge_users_into_options!(Array(users_to_add), options)
        response = post("1/lists/members/create_all", options)
        format.to_s.downcase == 'xml' ? response['list'] : response
      end