fact: Definition torsorMap_to_torsorIso {G} {X Y : Torsor G} (f : ActionMap X Y) : ActionIso X Y.
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