proposition: Lemma of_list_3 s : of_list (to_list s) == s.
proof: Proof. intros k. rewrite of_list_1b, bindings_o; auto. apply bindings_3w. Qed.
imports: Coq(Bool Equalities Orders OrdersFacts OrdersLists) Coq(Morphisms Permutation SetoidPermutation) MMaps(Utils Comparisons Interface)