code: func (fic *fileItemContainer) refreshTitle() {
  	if fic.current == nil {
  		return
  	}
  	// TODO(mpl): other title sources. or not? after all, we're a file
  	// container, so should we use anything other than the file name (which
  	// should always exist)? If/when the publisher supports anything other than
  	// files, then reconsider (and probably make another, different container
  	// anyway).
  	jQuery("h1#title").SetText(html.EscapeString(fic.current.fileName))
  }
docs: // No need for locking because only caller is render.