proposition: Lemma isaprop_essentially_surjective {C D : precategory_data} (F : functor C D) : isaprop (essentially_surjective F).
proof: Proof. apply impred; intro; apply isapropishinh. Defined.
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.MoreFoundations.PartA UniMath.MoreFoundations.Univalence UniMath.MoreFoundations.Tactics UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.TransportMorphisms UniMath.CategoryTheory.Core.Univalence