How to highlight the expanded records which are all having the nested table in WinForms GridGroupingControl?

//Triggering the event 
this.groupingGrid1.QueryCellStyleInfo += GroupingGrid1_QueryCellStyleInfo;
 
//Event customization.
private void GroupingGrid1_QueryCellStyleInfo(object sender, GridTableCellStyleInfoEventArgs e)
{
    if (e.TableCellIdentity != null)
    {
        Record record = e.TableCellIdentity.DisplayElement.GetRecord();
        if (record != null && record.IsExpanded && record.HasNestedTables && (e.Style.TableCellIdentity.TableCellType == GridTableCellType.RecordFieldCell || e.Style.TableCellIdentity.TableCellType == GridTableCellType.AlternateRecordFieldCell))
        {
            e.Style.BackColor = Color.LightBlue;
            e.Style.TextColor = Color.White;
        }
    }
}

'Triggering the event 
AddHandler Me.groupingGrid1.QueryCellStyleInfo, AddressOf GroupingGrid1_QueryCellStyleInfo
 
'Event customization.
Private Sub GroupingGrid1_QueryCellStyleInfo(ByVal sender As Object, ByVal e As GridTableCellStyleInfoEventArgs)
    If e.TableCellIdentity IsNot Nothing Then
        Dim record As Record = e.TableCellIdentity.DisplayElement.GetRecord()
        If record IsNot Nothing AndAlso record.IsExpanded AndAlso record.HasNestedTables AndAlso (e.Style.TableCellIdentity.TableCellType = GridTableCellType.RecordFieldCell OrElse e.Style.TableCellIdentity.TableCellType = GridTableCellType.AlternateRecordFieldCell) Then
            e.Style.BackColor = Color.LightBlue
            e.Style.TextColor = Color.White
        End If
    End If
End Sub