diff -r e0892dfd1b27 -r 3dfd62b4e2c8 src/HOL/Codegenerator_Test/Generate_Efficient_Datastructures.thy
--- a/src/HOL/Codegenerator_Test/Generate_Efficient_Datastructures.thy	Tue Apr 22 15:41:34 2025 +0200
+++ b/src/HOL/Codegenerator_Test/Generate_Efficient_Datastructures.thy	Tue Apr 22 19:02:33 2025 +0200
@@ -30,6 +30,7 @@
   "Gcd :: _ poly set \<Rightarrow> _"
   "Lcm :: _ poly set \<Rightarrow> _"
   nlists
+  Multiset.multisets_of_size
 ]]
 
 text \<open>