fact: Definition nat_trans_functor_assoc_inv (F1 : functor A B) (F2 : functor B C) (F3 : functor C D) : nat_trans (functor_composite F1 (functor_composite F2 F3)) (functor_composite (functor_composite F1 F2) F3) := nat_trans_functor_assoc F1 F2 F3.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.TransportMorphisms UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.Univalence