fact: Definition profunctor_nat_trans_weq_square {C D : category} (P Q : D ↛ C) : profunctor_nat_trans P Q ≃ profunctor_square (functor_identity _) (functor_identity _) P Q.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Prelude UniMath.CategoryTheory.Categories.HSET.All UniMath.CategoryTheory.Categories.HSET.SetCoends UniMath.CategoryTheory.Profunctors.Core UniMath.CategoryTheory.Profunctors.Examples UniMath.CategoryTheory.Profunctors.Transformation