public function setBreak($pCell = 'A1', $pBreak = PHPExcel_Worksheet::BREAK_NONE)
    {
        // Uppercase coordinate
        $pCell = strtoupper($pCell);

        if ($pCell != '') {
        	if ($pBreak == PHPExcel_Worksheet::BREAK_NONE) {
        		if (isset($this->_breaks[$pCell])) {
	            	unset($this->_breaks[$pCell]);
        		}
        	} else {
	            $this->_breaks[$pCell] = $pBreak;
	        }
        } else {
            throw new PHPExcel_Exception('No cell coordinate specified.');
        }

        return $this;
    }