Add ItemStack#getTranslationKey() (#5616)

Spigot-API-Patches/Item-Rarity-API.patch

@@ -65,9 +65,10 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 --- a/src/main/java/org/bukkit/UnsafeValues.java
 +++ b/src/main/java/org/bukkit/UnsafeValues.java
 @@ -0,0 +0,0 @@ public interface UnsafeValues {
+      * Use this when sending custom packets, so that there are no collisions on the client or server.
       */
      public int nextEntityId();
- 
++
 +    /**
 +     * Gets the item rarity of a material. The material <b>MUST</b> be an item.
 +     * Use {@link Material#isItem()} before this.
@@ -91,8 +92,8 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 --- a/src/main/java/org/bukkit/inventory/ItemStack.java
 +++ b/src/main/java/org/bukkit/inventory/ItemStack.java
 @@ -0,0 +0,0 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, net.kyor
-         ItemMeta itemMeta = getItemMeta();
-         return itemMeta != null && itemMeta.hasItemFlag(flag);
+     public String getTranslationKey() {
+         return Bukkit.getUnsafe().getTranslationKey(this);
      }
 +
 +    /**