public function exportRedcapVersion()
    {
        $data = array(
            'token' => $this->apiToken,
            'content' => 'version'
        );
        
        $redcapVersion = $this->connection->callWithArray($data);
        $recapVersion = $this->processExportResult($redcapVersion, 'string');
        
        return $redcapVersion;
    }