       or "/favicon-high.ico". Such matches are useful when serving
       digested files at the root. Defaults to `nil` (no filtering).
 
-    * `:headers` - other headers to be set when serving static assets.
-
   ## Acknowledgment
 
   The source code is derived from `Plug.Static` module.

    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

        _ -> raise ArgumentError, ":from must be an atom, a binary or a tuple"
      end

    {Plug.Router.Utils.split(at), from, only, prefix}
  end

  def call(conn = %Conn{method: meth}, {at, from, only, prefix})
      when meth in @allowed_methods do
    segments = subset(at, conn.path_info)

