There are lots of examples on how to access items 

 function GetSelectedRowsByID() 

    {

        var grid = $find('grdOffRequests');

        var grid1 = $find('<%=grdOffRequests.ClientID%>');

        var grid2 = $IG.WebDataGrid.find('<%= grdOffRequests.ClientID %>');    

        var selectedIDs = '';

        var rowsLength = grid.get_rows().get_length();

....

<ig:WebHierarchicalDataGrid ID="grdOffRequests" runat="server" 

..

So I tried a number of methods of getting the grid.  All form wonderful examples from this web forum.

My grid, grid1 and grid2 all are the same.  In the quickwatch of IE I see a number of methods 

get_bands()

get_id()

get_name()

Alas I see no get_rows()

Any suggestions?