SMART datagrid v.1 > Classes > GridRow
If this grid row is the descendant of Group Row specified by parameter group, it will return true.
var dataIndex = $('#edtRow').val();
var row = grid.getRowOfDataIndex(dataIndex);
if (row.isDescendantOf(groupRow)) {
$('#value').val(row.getValue(0));
grid.setFocusedRow(row);
}