fact: Definition pb_cone_cell (p : pb_cone) : invertible_2cell (pb_cone_pr1 p · f) (pb_cone_pr2 p · g) := pr222 p.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.Bicategories.Core.Bicat UniMath.Bicategories.Core.Invertible_2cells UniMath.Bicategories.Core.Univalence