fact: Definition lwhisker_functor (f : C⟦a, b⟧) : functor (hom b c) (hom a c) := make_functor (lwhisker_functor_data f) (is_functor_lwhisker f).
imports: UniMath.Tactics.EnsureStructuredProofs UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.PrecategoryBinProduct