OfficeOpenXml.Table.PivotTable.ExcelPivotTableField.AddGroupItem C# (CSharp) Method

        private void AddGroupItem(XmlElement groupItems, string value)
        {
            var s = groupItems.OwnerDocument.CreateElement("s", ExcelPackage.schemaMain);
            s.SetAttribute("v", value);
            groupItems.AppendChild(s);
        }