Definition isaset_square_double_bicat_law (B : ver_bicat_sq_id_comp_whisker) : UU := ∏ (w x y z : B) (h₁ : w --> x) (h₂ : y --> z) (v₁ : w -|-> y) (v₂ : x -|-> z), isaset (square_double_bicat h₁ h₂ v₁ v₂).
Require Import UniMath.MoreFoundations.All. Require Import UniMath.CategoryTheory.Core.Prelude. Require Import UniMath.CategoryTheory.TwoSidedDisplayedCats.TwoSidedDispCat. Require Import UniMath.Bicategories.Core.Bicat. Import Bicat.Notations.