protected boolean playUserSound(String soundIdentifier){
  Object sound=builtinSounds.get(soundIdentifier);
  if (sound == null) {
    return false;
  }
  return true;
}

protected boolean playUserSound ( String soundIdentifier ) { Object sound = builtinSounds . get ( soundIdentifier ) ; if ( sound == null ) { return false ; } return true ; }
plays a sound defined by the user
