#1475: Add tests for Minecraft registry <-> Bukkit fields

By: DerFrZocker <derrieple@gmail.com>

paper-server/src/main/java/org/bukkit/craftbukkit/CraftRegistry.java

@@ -279,6 +279,16 @@ public class CraftRegistry<B extends Keyed, M> implements Registry<B> {
         return bukkit;
     }
 
+    @NotNull
+    @Override
+    public B getOrThrow(@NotNull NamespacedKey namespacedKey) {
+        B object = get(namespacedKey);
+
+        Preconditions.checkArgument(object != null, "No registry entry found for key " + namespacedKey);
+
+        return object;
+    }
+
     @NotNull
     @Override
     public Stream<B> stream() {