Kraken\Promise\Deferred::__construct PHP Method

    public function __construct($canceller = null)
    {
        $this->promise = null;
        $this->resolveCallback = function ($value = null) {
        };
        $this->rejectCallback = function ($reason = null) {
        };
        $this->cancelCallback = function ($reason = null) {
        };
        $this->canceller = $canceller;
    }