src/main/java/org/intellimate/izou/sdk/frameworks/music/player/template/Player.java
@SuppressWarnings("unused")
    public void updatePlayInfo(Playlist playlist, Progress progress, Volume volume) {
        if (playlist != null)
            this.playlist = playlist;
        if (progress != null)
            this.progress = progress;
        if (volume != null)
            this.volume = volume;
        updatePlayInfo(playlist, progress, null, volume);
    }
@SuppressWarnings("unused")
    public void updatePlayInfo(Playlist playlist, Progress progress, Volume volume) {
        if (playlist != null)
            this.playlist = playlist;
        if (progress != null)
            this.progress = progress;
        if (volume != null)
            this.volume = volume;
        updatePlayInfo(playlist, progress, null, volume);
    }
updates the Info about the current song
@param playlist the playlist, or null
@param progress the progress, or null
@param volume the volume, or null