pocketmine\inventory\CraftingManager::registerFurnaceRecipe PHP 메소드

    public function registerFurnaceRecipe(FurnaceRecipe $recipe)
    {
        $input = $recipe->getInput();
        $this->furnaceRecipes[$input->getId() . ":" . ($input->getDamage() === null ? "?" : $input->getDamage())] = $recipe;
    }