Definition isaset_disp_mor {D : twosided_disp_cat} {x₁ x₂ : C₁} {y₁ y₂ : C₂} (xy₁ : D x₁ y₁) (xy₂ : D x₂ y₂) (f : x₁ --> x₂) (g : y₁ --> y₂) : isaset (xy₁ -->[ f ][ g ] xy₂). Proof. exact (pr2 (pr222 D) _ _ _ _ xy₁ xy₂ f g). Defined.
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.All. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.DisplayedCats.Core. Require Import UniMath.CategoryTheory.PrecategoryBinProduct.