--- 
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: