code: func ServeStaticFile(rw http.ResponseWriter, req *http.Request, root http.FileSystem, file string) {
  	f, err := root.Open("/" + file)
  	if err != nil {
  		http.NotFound(rw, req)
  		log.Printf("Failed to open file %q from embedded resources: %v", file, err)
  		return
  	}
  	defer f.Close()
  	var modTime time.Time
  	if fi, err := f.Stat(); err == nil {
  		modTime = fi.ModTime()
  	}
  	// TODO(wathiede): should pkg/magic be leveraged here somehow?  It has a
  	// slightly different purpose.
  	if strings.HasSuffix(file, ".svg") {
  		rw.Header().Set("Content-Type", "image/svg+xml")
  	}
  	http.ServeContent(rw, req, file, modTime, f)
  }
docs: // ServeStaticFile serves file from the root virtual filesystem.