fact: Definition pb_ump_cell_pr2 : pb_ump_cell ▹ pb_cone_pr2 p = β := pr221 (pr2 Hp q φ ψ α β r).
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.Bicategories.Core.Bicat UniMath.Bicategories.Core.Invertible_2cells UniMath.Bicategories.Core.Univalence