how to handle QueryRegenerateEvent?

Hi, I searched for that in the whole forum, the whole github, and I can't find a way to do that, I am editing the grabbag plugin by @aliuly for setting my main server online players with the count of all online players in my secondary servers, @PEMapModder suggested this for change the default query on a old thread:

PHP:

public function queryEverything(QueryRegenerateEvent $e){
$e->setPlayerCount($all["Players"]);
$e->setMaxPlayerCount($all["Max-Players"]);
}

but after that how i can call this function since QueryRegenerateEvent is not auto callable event such onEnable, onPlayerJoin, etc?
also, this code seems to work or i losing time? sorry for my english ^^

Not using the correct function I think :

Code:

     $this->getServer()->getQueryInformation()->setPlayerCount($numberOfPlayer);
        $this->getServer()->getQueryInformation()->setMaxPlayerCount($numberOfMaxPlayers);

QueryRegenerateEvent is automatically fired every few ticks.