Definition disp_2cells {C : prebicat_1_id_comp_cells} {D : disp_prebicat_1_id_comp_cells C} {c c' : C} {f g : C⟦c,c'⟧} (x : f ==> g) {d : D c} {d' : D c'} (f' : d -->[f] d') (g' : d -->[g] d') : UU := pr2 D c c' f g x d d' f' g'.
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.DisplayedCats.Total. Require Import UniMath.Bicategories.Core.Bicat. Import Bicat.Notations. Require Import UniMath.Bicategories.Core.Invertible_2cells. Require Import UniMath.Bicategories.Core.BicategoryLaws. Require Import UniMath.Bicategories.Core.Unitors. Require Import UniMath.Bicategories.Morphisms.Adjunctions. Require Import UniMath.Bicategories.Core.Univalence.