Definition rwhisker {C : prebicat_data} {a b c : C} {f1 f2 : C⟦a, b⟧} (g : C⟦b, c⟧) : f1 ==> f2 → f1 · g ==> f2 · g := λ x, pr2 (pr2 (pr2 (pr2 (pr2 (pr2 (pr2 (pr2 (pr2 (pr2 C))))))))) _ _ _ _ _ _ x.
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.