Definition id2 {C : two_cat_data} {a b : C} (f : C⟦a, b⟧) : f ==> f := pr122 C a b f.
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.All. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Core.Setcategories. Require Import UniMath.CategoryTheory.Core.Univalence.