private static void updateItemAttributes(LivingEntity entity) {
        if (entity == null) return;
        EntityEquipment equipment = entity.getEquipment();
        if (equipment == null) return;

        for (EquipmentSlot slot : EquipmentSlot.values()) {
            // get item by slot:
            ItemStack item = null;
            switch (slot) {
            case HAND:
                item = equipment.getItemInMainHand();
                break;
            case OFF_HAND:
                item = equipment.getItemInOffHand();
                break;
            case FEET:
                item = equipment.getBoots();
                break;
            case LEGS:
                item = equipment.getLeggings();
                break;
            case CHEST:
                item = equipment.getChestplate();
                break;
            case HEAD:
                item = equipment.getHelmet();
                break;
            default:
                break;
            }
            if (item == null || !item.hasItemMeta()) continue;

            Multimap<Attribute, AttributeModifier> modifiers = item.getItemMeta().getAttributeModifiers(slot);
            if (modifiers == null) continue;
            for (Entry<Attribute, Collection<AttributeModifier>> entry : modifiers.asMap().entrySet()) {
                AttributeInstance attributeInstance = entity.getAttribute(entry.getKey());
                if (attributeInstance == null) continue;
                for (AttributeModifier modifier : entry.getValue()) {
                    // duplicate modifiers are not allowed and there is no method to check if the modifier is
                    // already applied, so: remove first, in case the modifier is already active:
                    attributeInstance.removeModifier(modifier);
                    attributeInstance.addModifier(modifier);
                }
            }
        }
    }