Definition lwhisker_id2 {a b c : C} (f : C⟦a, b⟧) (g : C⟦b, c⟧) : f ◃ id2 g = id2 _ := pr1 (pr2 (pr2 (pr2 (pr2 C)))) _ _ _ f g.
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.All. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Core.Setcategories. Require Import UniMath.CategoryTheory.Core.Univalence.