fact: Definition sum_of_nat_trans_data {Q C₁ C₂ : category} {F G : bincoprod_of_category C₁ C₂ ⟶ Q} (α : inl_functor C₁ C₂ ∙ F ⟹ inl_functor C₁ C₂ ∙ G) (β : inr_functor C₁ C₂ ∙ F ⟹ inr_functor C₁ C₂ ∙ G) : nat_trans_data F G.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Univalence UniMath.CategoryTheory.whiskering