Lemma isPredicate_is_invertible_2cell {C : bicat} {a b : C} {f g: C⟦a,b⟧} : isPredicate (is_invertible_2cell (f := f) (g := g)). Proof. intro x. apply isaprop_is_invertible_2cell. Qed.
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.All. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Core.Isos. Require Import UniMath.CategoryTheory.Core.Functors. Require Import UniMath.CategoryTheory.Core.NaturalTransformations. Require Import UniMath.CategoryTheory.PrecategoryBinProduct.