proposition: Lemma eq_z_iso_disp {C : category} {D : disp_cat C} {x y : C} (f : z_iso x y) {xx : D x} {yy} (ff ff' : z_iso_disp f xx yy) : pr1 ff = pr1 ff' -> ff = ff'.
proof: Proof. apply subtypePath; intro; apply isaprop_is_z_iso_disp. Qed.
imports: UniMath.Foundations.Sets UniMath.MoreFoundations.PartA UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Univalence UniMath.CategoryTheory.DisplayedCats.Core