proposition: Lemma isaset_nat_trans_yoneda (C: category) (c : C) (F : functor C^op HSET) : isaset (nat_trans (yoneda_ob_functor_data C c) F).
proof: Proof. apply isaset_nat_trans. apply (has_homsets_HSET). Qed.
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 UniMath.CategoryTheory.opp_precat UniMath.CategoryTheory.Categories.HSET.Core UniMath.CategoryTheory.Categories.HSET.MonoEpiIso UniMath.CategoryTheory.whiskering