Rx\Operator\CombineLatestOperator::__construct PHP Метод

    public function __construct(array $observables, callable $resultSelector = null)
    {
        if (null === $resultSelector) {
            $resultSelector = function () {
                return func_get_args();
            };
        }
        foreach ($observables as $observable) {
            if (!$observable instanceof ObservableInterface) {
                throw new \InvalidArgumentException();
            }
        }
        $this->observables = $observables;
        $this->resultSelector = $resultSelector;
    }