fact: Definition doublecategory_to_twosided_disp_cat_data (C : doublecategory) : twosided_disp_cat_data (und_ob_hor_cat C) (und_ob_hor_cat C).
imports: UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.MoreFoundations.PartA UniMath.MoreFoundations.Notations UniMath.CategoryTheory.Core.Prelude UniMath.CategoryTheory.TwoSidedDisplayedCats.TwoSidedDispCat UniMath.CategoryTheory.TwoSidedDisplayedCats.Univalence