public static boolean isSkeletonWarriorDiamond (
            SkeletonWarriorDiamond MMSkeletonWarriorDiamond) {
        if (MMSkeletonWarriorDiamond instanceof Skeleton) {
            Skeleton SkeletonWarriorDiamond = (Skeleton) MMSkeletonWarriorDiamond;
            if (SkeletonWarriorDiamond.getEquipment().getChestplate()
                    .equals(new ItemStack(311))) {
                return true;
            }
        }
        return false;
    }