# File lib/rack/reloader.rb, line 66
      def rotation
        files = [$0, *$LOADED_FEATURES].uniq
        paths = ['./', *$LOAD_PATH].uniq

        files.map{|file|
          next if file =~ /\.(so|bundle)$/ # cannot reload compiled files

          found, stat = figure_path(file, paths)
          next unless found && stat && mtime = stat.mtime

          @cache[file] = found

          yield(found, mtime)
        }.compact
      end