Piwik\Plugins\Marketplace\Environment::getReleaseChannel PHP Method

    public function getReleaseChannel()
    {
        if (!empty($this->releaseChannel)) {
            return $this->releaseChannel->getId();
        }
    }

 private function fetch($action, $params)
 {
     ksort($params);
     // sort params so cache is reused more often even if param order is different
     $releaseChannel = $this->environment->getReleaseChannel();
     if (!empty($releaseChannel)) {
         $params['release_channel'] = $releaseChannel;
     }
     $params['prefer_stable'] = (int) $this->environment->doesPreferStable();
     $params['piwik'] = $this->environment->getPiwikVersion();
     $params['php'] = $this->environment->getPhpVersion();
     $params['mysql'] = $this->environment->getMySQLVersion();
     $params['num_users'] = $this->environment->getNumUsers();
     $params['num_websites'] = $this->environment->getNumWebsites();
     $query = http_build_query($params);
     $cacheId = $this->getCacheKey($action, $query);
     $result = $this->cache->fetch($cacheId);
     if ($result !== false) {
         return $result;
     }
     try {
         $result = $this->service->fetch($action, $params);
     } catch (Service\Exception $e) {
         throw new Exception($e->getMessage(), $e->getCode());
     }
     $this->cache->save($cacheId, $result, self::CACHE_TIMEOUT_IN_SECONDS);
     return $result;
 }