Definition vcomp2 {C : prebicat_data} {a b : C} {f g h: C⟦a, b⟧} : f ==> g → g ==> h → f ==> h := λ x y, pr1 (pr2 (pr2 (pr2 (pr2 (pr2 (pr2 (pr2 (pr2 C)))))))) _ _ _ _ _ x y.
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.All. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Core.Isos. Require Import UniMath.CategoryTheory.Core.Functors. Require Import UniMath.CategoryTheory.Core.NaturalTransformations. Require Import UniMath.CategoryTheory.PrecategoryBinProduct.