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public static class Serializer implements RecipeSerializer<GrindstonePolishingRecipe> {

        @Override
        public GrindstonePolishingRecipe fromJson(ResourceLocation pRecipeId, JsonObject jsonObject) {
            String group = GsonHelper.getAsString(jsonObject, "group", "");

            NonNullList<Ingredient> nonnulllist = itemsFromJson(GsonHelper.getAsJsonArray(jsonObject, "ingredients"));
            if (nonnulllist.isEmpty()) {
                throw new JsonParseException("No ingredients for shapeless recipe");
            }
            if (!jsonObject.has("result")) throw new com.google.gson.JsonSyntaxException("Missing result, expected to find a string or object");
            ItemStack result;
            if (jsonObject.get("result").isJsonObject()) {
                result = ShapedRecipe.itemStackFromJson(GsonHelper.getAsJsonObject(jsonObject, "result"));
            }
            else {
                String resultItem = GsonHelper.getAsString(jsonObject, "result");
                ResourceLocation resourcelocation = new ResourceLocation(resultItem);
                result = new ItemStack(ForgeRegistries.ITEMS.getDelegate(resourcelocation).orElseThrow(() -> new IllegalStateException("Item: " + resultItem + " does not exist")));
            }
            int experience = GsonHelper.getAsInt(jsonObject, "experience", 0);

            return new GrindstonePolishingRecipe(pRecipeId, group, nonnulllist, result, experience);
        }

        private static NonNullList<Ingredient> itemsFromJson(JsonArray pIngredientArray) {
            NonNullList<Ingredient> nonnulllist = NonNullList.create();

            for(int i = 0; i < pIngredientArray.size(); ++i) {
                Ingredient ingredient = Ingredient.fromJson(pIngredientArray.get(i));
                if (!ingredient.isEmpty()) {
                    nonnulllist.add(ingredient);
                }
            }

            return nonnulllist;
        }

        @Nullable
        @Override
        public GrindstonePolishingRecipe fromNetwork(ResourceLocation pRecipeId, FriendlyByteBuf pBuffer) {
            String group = pBuffer.readUtf();
            int i = pBuffer.readVarInt();
            NonNullList<Ingredient> nonnulllist = NonNullList.withSize(i, Ingredient.EMPTY);
            nonnulllist.replaceAll(ignored -> Ingredient.fromNetwork(pBuffer));
            ItemStack result = pBuffer.readItem();
            int experience = pBuffer.readInt();

            return new GrindstonePolishingRecipe(pRecipeId, group, nonnulllist, result, experience);
        }

        @Override
        public void toNetwork(FriendlyByteBuf pBuffer, GrindstonePolishingRecipe pRecipe) {
            pBuffer.writeUtf(pRecipe.recipeGroup);
            pBuffer.writeVarInt(pRecipe.ingredients.size());
            for(Ingredient ingredient : pRecipe.ingredients) {
                ingredient.toNetwork(pBuffer);
            }
            pBuffer.writeItem(pRecipe.result);
            pBuffer.writeInt(pRecipe.experience);
        }
    }