     from = Keyword.fetch!(opts, :from)
     only = Keyword.get(opts, :only, [])
     prefix = Keyword.get(opts, :only_matching, [])
-
-    headers = Keyword.get(opts, :headers, %{})
 
     from =
       case from do


      path = path(from, segments)
      directory_info = file_directory_info(conn, path)
      serve_directory_listing(directory_info, segments, headers)
    else
      conn
    end

  the directory listing for a specific directory, use the file
  system path.

  If a static asset directory cannot be found, `Plug.Static.Ls`
  simply forwards the connection to the rest of the pipeline.

  ## Options
