proposition: Lemma isaset_invertible_2cell {C : bicat} {X Y : C} (f g : X --> Y) : isaset (invertible_2cell f g).
proof: Proof. use isaset_total2. - apply C. - intro. apply isasetaprop. apply isaprop_is_invertible_2cell. Qed.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Functors UniMath.Bicategories.Core.Bicat