fact: Definition twosided_disp_cat_data {C₁ C₂ : precategory_data} : UU := ∑ (D : twosided_disp_cat_ob_mor C₁ C₂), twosided_disp_cat_id_comp D.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.DisplayedCats.Core UniMath.CategoryTheory.PrecategoryBinProduct