@EventHandler
    public void onEntityDamageByEntity(EntityDamageByEntityEvent event){
        Entity damager = event.getDamager();
        Bukkit.broadcastMessage("a");
        if(damager instance Player) {
            Bukkit.broadcastMessage("b");
            if(!HungerGames.players.contains(damager)) {
                Bukkit.broadcastMessage("c");
                event.setCancelled(true);
            }
        }
    }