fact: Definition symmetric_whiskers_swap_nat_trans {C : category} {M : monoidal C} (B : symmetric M) (x : C) : nat_trans (leftwhiskering_functor M x) (rightwhiskering_functor M x) := symmetric_whiskers_swap_nat_trans_data B x ,, symmetric_whiskers_swap_is_nat_trans B x.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.Monoidal.WhiskeredBifunctors UniMath.CategoryTheory.Monoidal.Categories