Eloquent\Phony\Event\EventOrderVerifier::expectedEvents PHP Method

    private function expectedEvents($events)
    {
        $expected = array();
        $earliestEvent = null;
        foreach ($events as $event) {
            if ($event instanceof Event) {
                $expected[] = $earliestEvent = $event;
            } else {
                if (!$event->hasEvents()) {
                    throw new InvalidArgumentException('Cannot verify event order with empty results.');
                }
                $subEvent = null;
                foreach ($event->allEvents() as $subEvent) {
                    if (!$earliestEvent || $subEvent->sequenceNumber() > $earliestEvent->sequenceNumber()) {
                        break;
                    }
                }
                $expected[] = $earliestEvent = $subEvent;
            }
        }
        return $expected;
    }