public function getColumnByOffset($pColumnOffset = 0) {
		list($rangeStart,$rangeEnd) = PHPExcel_Cell::rangeBoundaries($this->_range);
		$pColumn = PHPExcel_Cell::stringFromColumnIndex($rangeStart[0] + $pColumnOffset - 1);

		return $this->getColumn($pColumn);
	}
public function getColumnByOffset($pColumnOffset = 0) {
		list($rangeStart,$rangeEnd) = PHPExcel_Cell::rangeBoundaries($this->_range);
		$pColumn = PHPExcel_Cell::stringFromColumnIndex($rangeStart[0] + $pColumnOffset - 1);

		return $this->getColumn($pColumn);
	}
public function getColumnByOffset ( $ pColumnOffset = 0 ) { list ( $ rangeStart , $ rangeEnd ) = PHPExcel_Cell :: rangeBoundaries ( $ this -> _range ) ; $ pColumn = PHPExcel_Cell :: stringFromColumnIndex ( $ rangeStart [ 0 ] + $ pColumnOffset - 1 ) ; return $ this -> getColumn ( $ pColumn ) ; }
Get a specified AutoFilter Column by it's offset

@param	integer	$pColumnOffset		Column offset within range (starting from 0)
@throws	PHPExcel_Exception
@return PHPExcel_Worksheet_AutoFilter_Column
Get a specified AutoFilter Column by it s offset