public function onCompletion(Server $server)
{
$server->broadcastPacketsCallback($this->final, unserialize($this->targets));
$this->level = null;
$this->data = null;
$this->final = null;
$this->targets = null;
unset($this->level);
unset($this->data);
unset($this->final);
unset($this->targets);
}