onEvent("rei.group", (event) => {
    // This event allows you to add custom entry groups to REI, which can be used to clean up the entry list significantly.
    // As a simple example, we can add a "Swords" group which will contain all (vanilla) swords
    // Note that each group will need an id (ResourceLocation) and a display name (Component / String)
    event.groupItems("kubejs:rei_groups/swords", "Swords", [
        "minecraft:wooden_sword",
        "minecraft:stone_sword",
        "minecraft:iron_sword",
        "minecraft:diamond_sword",
        "minecraft:golden_sword",
        "minecraft:netherite_sword",
    ]);

    // An easy use case for grouping stuff together could be using tags:
    // In this case, we want all the Hanging Signs and Sign Posts from Supplementaries to be grouped together
    event.groupItemsByTag("supplementaries:rei_groups/hanging_signs", "Hanging Signs", "supplementaries:hanging_signs");
    event.groupItemsByTag("supplementaries:rei_groups/sign_posts", "Sign Posts", "supplementaries:sign_posts");

    // Another example: We want all of these items to be grouped together ignoring NBT,
    // so you don't have a bajillion potions and enchanted books cluttering up REI anymore
    const useNbt = ["potion", "enchanted_book", "splash_potion", "tipped_arrow", "lingering_potion"];

    useNbt.forEach((id) => {
        const item = Item.of(id);
        const { namespace, path } = Utils.id(item.id);
        console.info(id)
        console.info(id + 'asdasdasdasd \n' + namespace)
        event.groupSameItem(`kubejs:rei_groups/${namespace}/${path}`, item.getName(), item);
    });

    // Items can also be grouped using anything that can be expressed as an IngredientJS,
    // including for example regular expressions or lists of ingredients
    event.groupItems("kubejs:rei_groups/spawn_eggs", "Spawn Eggs", [
        /spawn_egg/,
    ]);
    event.groupItems("kubejs:rei_groups/beds", "Beds", [
        /_bed/,
    ]);

    // you can even use custom predicates for grouping, like so:
    event.groupItemsIf("kubejs:rei_groups/looting_stuff", "Stuff with Looting I", (item) =>
        // this would group together all items that have the Looting I enchantment on them
        item.hasEnchantment("minecraft:looting", 1)
    );

    // you can also group fluids in much the same way as you can group items, for instance:
    event.groupFluidsByTag("kubejs:rei_groups/fluid_tagged_as_water", `"Water" (yeah right lmao)`, "minecraft:water");
});