public function getRowsList()
    {
        //check whether workshett name is set or not
        if ($this->worksheetName == '')
            throw new Exception('Worksheet name not specified');
        $strURI = Product::$baseProductUri . '/cells/' . $this->getFileName() .
            '/worksheets/' . $this->worksheetName . '/cells/rows';
        $signedURI = Utils::sign($strURI);
        $responseStream = Utils::processCommand($signedURI, 'GET', '', '');
        $json = json_decode($responseStream);
        $listRows = array();
        foreach ($json->Rows->RowsList as $row) {
            $strURI = Product::$baseProductUri . '/cells/' . $this->getFileName() .
                '/worksheets/' . $this->worksheetName . '/cells/rows' . $row->link->Href;
            $signedURI = Utils::sign($strURI);
            $responseStream = Utils::processCommand($signedURI, 'GET', '', '');
            $json = json_decode($responseStream);
            array_push($listRows, $json->Row);
        }
        return $listRows;

    }