$parent
$parent : \PHPExcel_Worksheet
Parent worksheet
PHPExcel_CachedObjectStorage_SQLite3
Copyright (c) 2006 - 2015 PHPExcel
This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
$parent : \PHPExcel_Worksheet
Parent worksheet
$currentObject : \PHPExcel_Cell
The currently active Cell
__construct(\PHPExcel_Worksheet  $parent) 
                Initialise this new cell collection
| \PHPExcel_Worksheet | $parent | The worksheet for this cell collection | 
getParent() : \PHPExcel_Worksheet
Return the parent worksheet for this cell collection
updateCacheData(\PHPExcel_Cell  $cell) : \PHPExcel_Cell
                Add or Update a cell in cache
| \PHPExcel_Cell | $cell | Cell to update | 
copyCellCollection(\PHPExcel_Worksheet  $parent) : void
                Clone the cell collection
| \PHPExcel_Worksheet | $parent | The new worksheet | 
addCacheData(string $pCoord, \PHPExcel_Cell $cell) : \PHPExcel_Cell
Add or Update a cell in cache identified by coordinate address
| string | $pCoord | Coordinate address of the cell to update | 
| \PHPExcel_Cell | $cell | Cell to update | 
getCacheData(string  $pCoord) : \PHPExcel_Cell
                Get cell at a specific coordinate
| string | $pCoord | Coordinate of the cell | 
Cell that was found, or null if not found