src/main/java/org/intellimate/izou/sdk/frameworks/music/player/template/Player.java
@Override
    public void updatePlayInfo(Volume volume) {
        if (this.volume.equals(volume))
            return;
        this.volume = volume;
        MusicHelper.super.updatePlayInfo(volume);
    }
@Override
    public void updatePlayInfo(Volume volume) {
        if (this.volume.equals(volume))
            return;
        this.volume = volume;
        MusicHelper.super.updatePlayInfo(volume);
    }
fires an update event which notifies that parameters have changed

@param volume the optional volume