proposition: Lemma iso_from_folds_iso_folds_iso_from_iso : iso_from_folds_iso _ _ (folds_iso_from_iso _ _ i) = i.
proof: Proof. apply (z_iso_eq(C:=C',,hs)). apply (@id_left C'). Qed.
imports: UniMath.Folds.UnicodeNotations UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.Foundations.UnivalenceAxiom UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.Folds.folds_precat UniMath.Folds.from_precats_to_folds_and_back