fact: Definition z_iso_inv_from_z_iso {C : precategory_data} {a b : ob C} (f : z_iso a b) : z_iso b a.
imports: UniMath.Foundations.PartA UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.MoreFoundations.Tactics UniMath.CategoryTheory.Core.Categories