code: protected void fireAnnounceResponseEvent(int complete, int incomplete, int interval, String hexInfoHash) {
      for (AnnounceResponseListener listener : this.listeners) {
        listener.handleAnnounceResponse(interval, complete, incomplete, hexInfoHash);
      }
    }
docs: Fire the announce response event to all listeners.
  
  @param complete   The number of seeders on this torrent.
  @param incomplete The number of leechers on this torrent.
  @param interval   The announce interval requested by the tracker.