## Properties:
-* private $observers = NULL
- SplObjectStorage, attached observers.
-* protected $options = NULL
- Array of set options.
-* protected $history = NULL
- http\Message request/response history.
-* public $recordHistory = false
- Boolean flag whether to record history in http\Client::$history.
+* private SplObjectStorage $observers = NULL
+ Attached observers.
+* protected array $options = NULL
+ Set options.
+* protected http\Message $history = NULL
+ Request/response history.
+* public bool $recordHistory = false
+ Whether to record history in http\Client::$history.