code help

@EventHandler
    public void onAnvilCombined(PrepareAnvilEvent e){
        ItemStack[] contents = e.getInventory().getContents();
        ItemStack firstSlot = contents[0];
        ItemStack secondSlot = contents[1];
        if (firstSlot == null || secondSlot == null){
            return;
        }
        for (String key : getConfig().getConfigurationSection("Recipes").getKeys(false)){
            ConfigurationSection keySection = getConfig().getConfigurationSection("Recipes").getConfigurationSection(key);
            if (firstSlot.getType().equals(Material.matchMaterial(keySection.getString("firstItem")))){
                if (secondSlot.getType().equals(Material.matchMaterial(keySection.getString("secondItem")))){
                    ItemStack item = new ItemStack(Material.matchMaterial(keySection.getString("itemResult")));
                    ItemMeta meta = item.getItemMeta();
                    meta.setDisplayName(ChatColor.translateAlternateColorCodes('&', keySection.getString("name")));
                    ArrayList<String> lore = new ArrayList<>();
                    for (String s : keySection.getStringList("lore")) {
                        lore.add(ChatColor.translateAlternateColorCodes('&', s));
                    }
                    meta.setLore(lore);
                    item.setItemMeta(meta);
                    e.getInventory().setRepairCost(Integer.parseInt(keySection.getString("levelCost")));
                    e.setResult(item);
                }else{
                    return;
                }
            }else{
                return;
            }
        }
    }