proposition: Corollary torsor_hlevel {G:gr} : isofhlevel 3 (Torsor G).
proof: Proof. intros X Y. apply (isofhlevelweqb 2 torsor_univalence). apply ActionIso_isaset. Defined.
imports: UniMath.Foundations.All UniMath.MoreFoundations.Propositions UniMath.MoreFoundations.Notations UniMath.MoreFoundations.Univalence UniMath.MoreFoundations.Tactics UniMath.Algebra.Monoids UniMath.Algebra.Groups UniMath.Combinatorics.OrderedSets