// Creating tagsTag<String> nameTag = Tag.String("custom_name");Tag<Integer> levelTag = Tag.Integer("player_level");Tag<Double> balanceTag = Tag.Double("player_balance");Tag<Boolean> isVipTag = Tag.Boolean("is_vip");// Setting tags (on objects that implement TagWritable)Player player = // ... get playerif (player instanceof TagWritable writable) {    writable.setTag(nameTag, "CustomPlayer");    writable.setTag(levelTag, 50);    writable.setTag(balanceTag, 1000.0);    writable.setTag(isVipTag, true);}// Reading tags (on objects that implement TagReadable)if (player instanceof TagReadable readable) {    String name = readable.getTag(nameTag); // May return null    Integer level = readable.getTag(levelTag);    Double balance = readable.getTag(balanceTag);    Boolean isVip = readable.getTag(isVipTag);}// Checking if tag existsif (player instanceof TagReadable readable) {    if (readable.hasTag(levelTag)) {        // Tag exists    }}// Removing tagsif (player instanceof TagWritable writable) {    writable.removeTag(levelTag);}// Using tags in custom entity classpublic class CustomEntity extends EntityLiving {    private static final Tag<String> CUSTOM_DATA = Tag.String("custom_data");    private static final Tag<Integer> CUSTOM_LEVEL = Tag.Integer("custom_level");        public void setCustomData(String data) {        setTag(CUSTOM_DATA, data);    }        public String getCustomData() {        return getTag(CUSTOM_DATA);    }        public void setCustomLevel(int level) {        setTag(CUSTOM_LEVEL, level);    }        public int getCustomLevel() {        Integer level = getTag(CUSTOM_LEVEL);        return level != null ? level : 0;    }}// Tags persist across server restarts (if entity is saved)// Tags are automatically serialized with entity data// Tags use efficient NBT format for storage