private void OnDisable()
 {
     if (audioEvent != null)
     {
         audioEvent.RemoveListener(this);
     }
 }
    /// <summary>
    /// Remove audio listener function.
    /// </summary>
    /// <param name="listener"></param>
    public static void RemoveAudioListener(UnityAction <AudioClip> listener)
    {
        if (eventManager == null)
        {
            return;
        }
        AudioEvent thisEvent = null;

        if (instance.audioEventDictionary.TryGetValue(AUDIOEVENT, out thisEvent))
        {
            thisEvent.RemoveListener(listener);
        }
    }