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

        internal ExcelPivotTableFieldNumericGroup SetNumericGroup(double start, double end, double interval)
        {
            ExcelPivotTableFieldNumericGroup group;
            group = new ExcelPivotTableFieldNumericGroup(NameSpaceManager, _cacheFieldHelper.TopNode);
            _cacheFieldHelper.SetXmlNodeBool("d:sharedItems/@containsNumber", true);
            _cacheFieldHelper.SetXmlNodeBool("d:sharedItems/@containsInteger", true);
            _cacheFieldHelper.SetXmlNodeBool("d:sharedItems/@containsSemiMixedTypes", false);
            _cacheFieldHelper.SetXmlNodeBool("d:sharedItems/@containsString", false);

            group.TopNode.InnerXml += string.Format("<fieldGroup base=\"{0}\"><rangePr autoStart=\"0\" autoEnd=\"0\" startNum=\"{1}\" endNum=\"{2}\" groupInterval=\"{3}\"/><groupItems /></fieldGroup>", BaseIndex, start.ToString(CultureInfo.InvariantCulture), end.ToString(CultureInfo.InvariantCulture), interval.ToString(CultureInfo.InvariantCulture));
            int items = AddNumericGroupItems(group, start, end, interval);
            AddFieldItems(items);

            _grouping = group;
            return group;
        }