CellIterator.php

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<?php
abstract class PHPExcel_Worksheet_CellIterator
{
        protected $_subject;
 
        protected $_position = null;
 
        protected $_onlyExistingCells = false;
 
        public function __destruct() {
                unset($this->_subject);
        }
 
    public function getIterateOnlyExistingCells() {
        return $this->_onlyExistingCells;
    }
 
    abstract protected function adjustForExistingOnlyRange();
 
    public function setIterateOnlyExistingCells($value = true) {
        $this->_onlyExistingCells = (boolean) $value;
 
        $this->adjustForExistingOnlyRange();
    }
}