Find & Collapse Specific Group based on FieldName

[AJ]

Is it possible to collapse (or expand) a group based on the Group's FieldName property?

I have the following in my PreRender function, but it just collapses all groups:

foreach (var gi in rgVendorInvItems.MasterTableView.GetItems(GridItemType.GroupHeader))
{
     gi.SetChildrenVisible(false);
}

Any input would be greatly appreciated!

[AJ]

Alright, so it figures as soon as I ask the next page I go to has a good example, based on the Data Cell's text

foreach (var item in rgVendorInvItems.MasterTableView.GetItems(GridItemType.GroupHeader))
            {
                if (((GridGroupHeaderItem)(item)).DataCell.Text.Contains("33-1575"))
                    item.Expanded = true;
                else
                    item.Expanded = false;
            }