Rx\Scheduler\VirtualTimeScheduler::schedule PHP Метод

    public function schedule(callable $action, $delay = 0)
    {
        $invokeAction = function ($scheduler, $action) {
            $action();
            return new EmptyDisposable();
        };
        return $this->scheduleAbsoluteWithState($action, $this->now() + $delay, $invokeAction);
    }