internal void Initialize()
 {
     if (_topLevelGroupDescription == null)
     {
         _topLevelGroupDescription = new TopLevelGroupDescription();
     }
     InitializeGroup(this, _topLevelGroupDescription, 0);
 }
 internal void Initialize()
 {
     if (_topLevelGroupDescription == null)
     {
         _topLevelGroupDescription = new TopLevelGroupDescription();
     }
     InitializeGroup(this, _topLevelGroupDescription, 0);
 }