fact: Definition indexed_cat_id_z_iso {C : category} (Φ : indexed_cat C) {x : C} (xx : Φ x) : z_iso xx ((Φ $ identity x) xx).
imports: UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Univalence UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations