code: func (t *Torrent) SetDisplayName(dn string) {
  	t.nameMu.Lock()
  	defer t.nameMu.Unlock()
  	if t.haveInfo() {
  		return
  	}
  	t.displayName = dn
  }
docs: // Clobbers the torrent display name. The display name is used as the torrent
  // name if the metainfo is not available.