fact: Definition isaprop_is_opcartesian_2cell_sopfib {x : B} {f : x --> e} {g : x --> e} (γ : f ==> g) : isaprop (is_opcartesian_2cell_sopfib γ).
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