fact: Definition pb_2cell_pr1 {p q : pb_cone} {φ ψ : pb_1cell p q} (η : pb_2cell φ ψ) : (η ▹ pb_cone_pr1 q) • pb_1cell_pr1 ψ = pb_1cell_pr1 φ := pr12 η.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.Bicategories.Core.Bicat UniMath.Bicategories.Core.Invertible_2cells UniMath.Bicategories.Core.Univalence