fact: Definition indexed_cat_comp_nat_z_iso {C : category} (F : indexed_cat C) {x y z : C} (f : x --> y) (g : y --> z) : nat_z_iso ((F $ f) ∙ (F $ g)) (F $ (f · g)).
imports: UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Univalence UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations