code: public void addTracks(List<SoundCloudTrack> tracks) {
          checkState();
          for (SoundCloudTrack track : tracks) {
              addTrack(track);
          }
      }
docs: Add a list of track to thr current SoundCloud player playlist.
  
  @param tracks list of {@link fr.tvbarthel.cheerleader.library.client.SoundCloudTrack}
  to be added to the player.