public void SaveBGM(AudioSource source)
 {
     if (source.isPlaying)
     {
         BGM       = new ElementClass <float>();
         BGM.Key   = source.clip.name;
         BGM.Value = source.time;
     }
 }
 public void SaveBGM(string name, float time)
 {
     if (name != null)
     {
         BGM       = new ElementClass <float>();
         BGM.Key   = name;
         BGM.Value = time;
     }
     else
     {
         BGM = null;
     }
 }