public void grantItems(Arena arena, Player p, String className) {
List<Upgrade> list = upgrades.get(className);
if (list == null) return;
if (giveAll) {
for (Upgrade upgrade : list) {
upgrade.upgrade(arena, p);
}
} else {
int index = new Random().nextInt(list.size());
list.get(index).upgrade(arena, p);
}
}
