fact: Definition und_ver_cat_ob_mor (C: predoublecategory_hor_sq) : und_ver_cat_ob C → und_ver_cat_ob C → UU := fun c d => (get_und_ver_cat_ob_mor c d).
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