fact: Definition invertible_is_opcartesian_2cell_sopfib {B : bicat} {e b : B} (p : e --> b) {x : B} {f g : x --> e} (α : f ==> g) (Hα : is_invertible_2cell α) : is_opcartesian_2cell_sopfib p α.
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