fact: Definition post_whisker {B C D : precategory_data} {G H : functor_data B C} (gamma : nat_trans G H) (K : functor C D) : nat_trans (functor_composite_data G K) (functor_composite_data H K).
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.FunctorCategory