Auth0\SDK\API\Helpers\ApiClient::getInfoHeadersData PHP Method

    public static function getInfoHeadersData()
    {
        if (!self::$infoHeadersDataEnabled) {
            return null;
        }
        if (self::$infoHeadersData === null) {
            self::$infoHeadersData = new InformationHeaders();
            self::$infoHeadersData->setPackage('auth0-php', self::API_VERSION);
            self::$infoHeadersData->setEnvironment('PHP', phpversion());
        }
        return self::$infoHeadersData;
    }

 public function __construct()
 {
     $oldInfoHeaders = ApiClient::getInfoHeadersData();
     if ($oldInfoHeaders) {
         $infoHeaders = InformationHeaders::Extend($oldInfoHeaders);
         $infoHeaders->setEnvironment('Symfony', Kernel::VERSION);
         $infoHeaders->setPackage('jwt-auth-bundle', self::SDK_VERSION);
         ApiClient::setInfoHeadersData($infoHeaders);
     }
 }