public class FireballTask implements Runnable{

    @Override
    public void run() {
        for(Player player : Bukkit.getOnlinePlayers()){
            User user = UserManager.getUser(player);
                for(Fireball fireball : user.getFireballs()){
                    if(!Bukkit.getWorld(player.getWorld().getName()).getEntities().contains(fireball)){
                        user.getFireballs().remove(fireball);
                        player.sendMessage("Eksplozja");
                    }
                }

        }
    }

    public void start(){
        Bukkit.getScheduler().runTaskTimerAsynchronously(Main.getInst(), this, 10L, 10L);
    }
}