Solved How do I smelt a custom item?

So I have 2 items, a piece of cobblestone and a piece of stone. I want to create a recipe so that I can smelt the stone into cobblestone but with the custom names and metadata. How would I do that?

Code:

public static ItemStack something;
public static void itemSomething() {
  ItemStack item = newItemStack(Material.Cobblestone, 1)
  ItemMeta meta = item.getItemMeta();
  meta.setdisplayName("Super Cobblestone")
  item.setItemMeta(meta);
  something = item;
}

public static ItemStack somethingelse;
public static void itemSomethingElse() {
  ItemStack item = newItemStack(Material.Stone, 1)
  ItemMeta meta = item.getItemMeta();
  meta.setdisplayName("Super Stone")
  item.setItemMeta(meta);
  somethingelse = item;

  FurnaceRecipe recipe = new
  FurnaceRecipe(NamespaceKey.minecraft("super_stone"), item, <the stone would be here>, 1.0f, 200)
  bukkit.getServer.addRecipe(recipe)
}

Thanks

 

https://hub.spigotmc.org/javadocs/spigot/org/bukkit/event/inventory/FurnaceSmeltEvent.html