public function getSolrconfigName()
    {
        if (is_null($this->solrconfigName)) {
            $solrconfigXmlUrl = $this->_constructUrl(self::FILE_SERVLET, ['file' => 'solrconfig.xml']);
            $response = $this->_sendRawGet($solrconfigXmlUrl);
            $solrconfigXml = simplexml_load_string($response->getRawResponse());
            if ($solrconfigXml === false) {
                throw new \InvalidArgumentException('No valid xml response from schema file: ' . $solrconfigXmlUrl);
            }
            $this->solrconfigName = (string)$solrconfigXml->attributes()->name;
        }

        return $this->solrconfigName;
    }