public function freezePanes($row = 1, $col = 1, $freezedRows = 1, $freezedCols = 1)
    {
        //check whether worksheet name is set or not
        if ($this->worksheetName == '')
            throw new Exception('Worksheet name not specified');

        $strURI = Product::$baseProductUri . '/cells/' . $this->getFileName() .
            '/worksheets/' . $this->worksheetName . '/FreezePanes?row=' . $row . '&column=' . $col . '&freezedRows=' . $freezedRows . '&freezedColumns=' . $freezedCols;

        $signedURI = Utils::sign($strURI);

        $responseStream = Utils::processCommand($signedURI, 'PUT', '', '');
        $json = json_decode($responseStream);
        if ($json->Code == 200)
            return true;
        else
            return false;

    }