Rx\Scheduler\VirtualTimeScheduler::getNext PHP Метод

    public function getNext()
    {
        while ($this->queue->count() > 0) {
            $next = $this->queue->peek();
            if ($next->isCancelled()) {
                $this->queue->dequeue();
            } else {
                return $next;
            }
        }
        return null;
    }