SMART datagrid v.1 > Classes > RowGroupPanel
RowGroupPanelHead object which manages Row Grouping Panel head area setting information.
    grid.setOptions({
        rowGroup: {
            panel: {
                prompt: 'group by',
                head: {
                    showMenu: false
                }
            }
        }
    });
    grid.groupPanel().setHead({
        showMenu: false
    });