fact: Definition id_is_opcartesian_2cell_sopfib {B : bicat} {e b : B} (p : e --> b) {x : B} (f : x --> e) : is_opcartesian_2cell_sopfib p (id2 f).
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.Bicategories.Core.Bicat UniMath.Bicategories.Core.Invertible_2cells UniMath.Bicategories.Core.Examples.OpCellBicat UniMath.Bicategories.Core.Univalence UniMath.Bicategories.Core.UnivalenceOp UniMath.Bicategories.Morphisms.InternalStreetFibration