How to export to excel without empty child groups in WinForms GridGroupingControl?

converter.QueryExportNestedTable += converter_QueryExportNestedTable;

/// <summary>
/// Hide the empty elements being exported to Excel.
/// </summary>
void converter_QueryExportNestedTable(object sender, ExportNestedTableEventArgs e)
{
    if (e.NestedTable.Records.Count == 0)
        e.Cancel = true;
}

AddHandler converter.QueryExportNestedTable, AddressOf converter_QueryExportNestedTable

''' <summary>
''' Hide the empty elements being exported to Excel.
''' </summary>
Private Sub converter_QueryExportNestedTable(ByVal sender As Object, ByVal e As ExportNestedTableEventArgs)
    If e.NestedTable.Records.Count = 0 Then
         e.Cancel = True
     End If
End Sub