src/HOL/Tools/Sledgehammer/sledgehammer_prover_atp.ML

           val used_facts = sort_by fst (used_facts_in_atp_proof ctxt (map fst used_from) atp_proof)
           val needs_full_types = is_typed_helper_used_in_atp_proof atp_proof
           val preferred_methss =
             (Metis_Method (NONE, NONE),
              bunches_of_proof_methods ctxt try0 smt_proofs needs_full_types
-              (if atp_proof_prefers_lifting atp_proof then liftingN else hide_lamsN))
+              (if atp_proof_prefers_lifting atp_proof then liftingN else opaque_liftingN))
         in
           (used_facts, preferred_methss,
            fn preplay =>
               let
                 val _ = if verbose then writeln "Generating proof text..." else ()