--- extends: http://vwf.example.com/node.vwf methods: loadSound: clearAllSounds: isReady: playSound: playSequence: isSoundPlaying: isInstancePlaying: setVolume: setMasterVolume: hasSubtitle: getSubtitle: getDuration: stopSoundInstance: stopSoundGroup: stopAllSoundInstances: events: soundFinished: soundStarted: