Todo List
PHPExcel_CachedObjectStorage_CacheBase | --PHPExcel_CachedObjectStorage_Memory
Implements interfaces:
void addCacheData( string $pCoord, PHPExcel_Cell $cell)
void copyCellCollection( PHPExcel_Worksheet $parent)
PHPExcel_Cell getCacheData( string $pCoord)
void unsetWorksheetCells( )