fact: Definition morphism_from_z_iso {C : precategory_data} (a b : ob C) (f : z_iso a b) : a --> b := pr1 f.
imports: UniMath.Foundations.PartA UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.MoreFoundations.Tactics UniMath.CategoryTheory.Core.Categories