fact: Definition bc_whisker_l {C : bicat} {X Y Z : C} {f₁ : C⟦X,Y⟧} {f₂ : C⟦X,Y⟧} (g : C⟦Y,Z⟧) (α : f₁ ==> f₂) : (g ∘ f₁) ==> (g ∘ f₂) := id₂ g ⋆⋆ α.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Functors UniMath.Bicategories.Core.Bicat