Kraken\Promise\PromiseFulfilled::always PHP Method

    public function always(callable $onFulfilledOrRejected)
    {
        return $this->then(function ($value) use($onFulfilledOrRejected) {
            return Promise::doResolve($onFulfilledOrRejected())->then(function () use($value) {
                return $value;
            });
        });
    }