public function Export($publicSurveyID, $fileName, $fileFormat = \ElasticEmailEnums\ExportFileFormats::Csv, $compressionFormat = \ElasticEmailEnums\CompressionFormat::None) {
        return $this->sendRequest('survey/export', array(
                    'publicSurveyID' => $publicSurveyID,
                    'fileName' => $fileName,
                    'fileFormat' => $fileFormat,
                    'compressionFormat' => $compressionFormat
        ));
    }