fact: Definition has_comma_ump_2 {p : comma_cone} (H : has_comma_ump p) : comma_ump_2 p := pr2 H.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.Bicategories.Core.Bicat UniMath.Bicategories.Core.Invertible_2cells UniMath.Bicategories.Core.Univalence