internal BitArrayMaskCache(TotalsCachePivotData pvtDataWr)
 {
     PvtDataWrapper = pvtDataWr;
     Size           = (pvtDataWr.Dimensions.Length - 1) / sizeof(int) + 1;
     Cache          = new Dictionary <BitArrayMask, PivotData>();
 }
 internal UlongMaskCache(TotalsCachePivotData pvtDataWr)
 {
     PvtDataWrapper = pvtDataWr;
     Cache          = new Dictionary <UlongMask, PivotData>();
 }