detail_args_for

# File actionview/lib/action_view/lookup_context.rb, line 175
      def detail_args_for(options) # :doc:
        return @details, details_key if options.empty? # most common path.
        user_details = @details.merge(options)

        if @cache
          details_key = DetailsKey.details_cache_key(user_details)
        else
          details_key = nil
        end

        [user_details, details_key]
      end