private void ResolveCellCleanableState(XmlNodeInformation nodeInfo, bool m_isFirstCellRefForSheet)
 {
     string cellRef = nodeInfo.GetAttributeValue("r");
     Dictionary<string, byte> actualCellRefs;
     if(m_processingDictionaries.GetActualCleanableCellRefs(m_lastSheetIndex, out actualCellRefs))
     {
         SetCleanableStateFlags(actualCellRefs, cellRef);
     }
     else
     {
         m_inCleanableFormulaCell = false;
         if (m_addSheetIndexToNextValidCellRef)
         {
             string sheetIndex = nodeInfo.GetAttributeValue("i");
             if (string.IsNullOrEmpty(sheetIndex))//if it isn't then we have moved to cell refs for another sheet so we don't add this one
             {
                 nodeInfo.CreateNewAttribute("", "i", "", m_lastSheetIndex);
             }
             m_addSheetIndexToNextValidCellRef = false;
         }
     }
 }