Lemma bc_whisker_l_id₂ {C : bicat} {X Y Z : C} (f : C⟦X,Y⟧) (g : C⟦Y,Z⟧) : g ◅ (id₂ f) = id₂ (g ∘ f). Proof. apply id2_rwhisker. Qed.
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.Bicategories.Core.Bicat. Import Bicat.Notations.