--- exercises/070_comptime5.zig	2023-10-03 22:15:22.125574535 +0200
+++ answers/070_comptime5.zig	2023-10-05 20:04:07.159435482 +0200
@@ -123,8 +123,8 @@
     // Please make sure MyType has both waddle() and quack()
     // methods:
     const MyType = @TypeOf(possible_duck);
-    const walks_like_duck = ???;
-    const quacks_like_duck = ???;
+    const walks_like_duck = @hasDecl(MyType, "waddle");
+    const quacks_like_duck = @hasDecl(MyType, "quack");
 
     const is_duck = walks_like_duck and quacks_like_duck;