88     protected $userAgent = '';  variable in DeviceDetector\\DeviceDetector
185      * @param string      $userAgent   UA to parse
188     public function __construct(string $userAgent = '', ?ClientHints $clientHints = null)  argument
190         if ('' !== $userAgent) {
191             $this->setUserAgent($userAgent);
243      * @param string $userAgent
245     public function setUserAgent(string $userAgent): void  argument
247         if ($this->userAgent !== $userAgent) {
251         $this->userAgent = $userAgent;
556         return $this->userAgent;
601         if ((empty($this->userAgent) || !\preg_match('/([a-z])/i', $this->userAgent))
1126             && false !== \strpos($this->userAgent, 'Desktop')
1163         if (\preg_match($regex, $this->userAgent, $matches)) {