Using QueryRegenerateEvent to create custom max-players count

Hello! I want to tall you, how to create custom max-players count. Is the visual effect, not real. Example: you create 16777216 fake slots, but join to your server can only 20 players. Here is the screenshot. Continue. You can use QueryRegenerateEvent and his method: QueryRegenerateEvent::setMaxPlayerCount(int $count)
Example:

Code:

public function onQuery(QueryRegenerateEvent $ev) {
$event->setMaxPlayerCount(16777216);
}

Thanks for reading!