code: private void fireMusicSwapped(Music newMusic) {
  		playing = false;
  		for (int i=0;i<listeners.size();i++) {
  			((MusicListener) listeners.get(i)).musicSwapped(this, newMusic);
  		}
  	}
docs: Fire notifications that this music was swapped out
  
  @param newMusic The new music that will be played