PaperMC/paper-server/nms-patches/net/minecraft/world/item/crafting/SmithingTrimRecipe.patch

--- a/net/minecraft/world/item/crafting/SmithingTrimRecipe.java
+++ b/net/minecraft/world/item/crafting/SmithingTrimRecipe.java
@@ -18,6 +18,13 @@
 import net.minecraft.world.item.armortrim.TrimPatterns;
 import net.minecraft.world.level.World;
 
+// CraftBukkit start
+import org.bukkit.NamespacedKey;
+import org.bukkit.craftbukkit.inventory.CraftRecipe;
+import org.bukkit.craftbukkit.inventory.CraftSmithingTrimRecipe;
+import org.bukkit.inventory.Recipe;
+// CraftBukkit end
+
 public class SmithingTrimRecipe implements SmithingRecipe {
 
     final RecipeItemStack template;
@@ -107,6 +114,13 @@
         return Stream.of(this.template, this.base, this.addition).anyMatch(RecipeItemStack::isEmpty);
     }
 
+    // CraftBukkit start
+    @Override
+    public Recipe toBukkitRecipe(NamespacedKey id) {
+        return new CraftSmithingTrimRecipe(id, CraftRecipe.toBukkit(this.template), CraftRecipe.toBukkit(this.base), CraftRecipe.toBukkit(this.addition));
+    }
+    // CraftBukkit end
+
     public static class a implements RecipeSerializer<SmithingTrimRecipe> {
 
         private static final Codec<SmithingTrimRecipe> CODEC = RecordCodecBuilder.create((instance) -> {