proposition: Lemma isaprop_is_dagger_functor {C D : category} (dagC : dagger C) (dagD : dagger D) (F : functor C D) : isaprop (is_dagger_functor dagC dagD F).
proof: Proof. repeat (apply impred_isaprop ; intro) ; apply homset_property. Qed.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.DaggerCategories.Categories