private TrackBuffering tracksAlbum;
public SearchService(IITPlaylist itPlaylist, Source source) {
this.itPlaylist = itPlaylist;
this.source = source;
this.tracksArtist = new TrackBuffering(new Clock());
this.tracksComposer = new TrackBuffering(new Clock());
this.tracksAlbum = new TrackBuffering(new Clock());
}