private void addHookInformation2Rebar( ArrayList data, Rebar rebar, int end )
        {
            if( end != 0 && end != 1 )
            return;

              ElementId hookId = rebar.GetHookTypeId( end );
              if( hookId != null && hookId != ElementId.InvalidElementId )
              {
            data.Add( new Snoop.Data.CategorySeparator( "HookType at end: " + end.ToString() ) );
            data.Add( new Snoop.Data.ElementId( "Hook Type", hookId, rebar.Document ) );
            data.Add( new Snoop.Data.String( "HookOrientation", rebar.GetHookOrientation( end ).ToString() ) );
              }
        }