fact: Definition pre_whisker {A B C : precategory_data} (F : functor_data A B) {G H : functor_data B C} (gamma : nat_trans G H) : nat_trans (functor_composite_data F G) (functor_composite_data F H).
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