fact: Definition lwhisker_is_cartesian : UU := ∏ (x y : B) (h : y --> x) (f g : x --> e) (γ : f ==> g) (Hγ : is_cartesian_2cell_sfib γ), is_cartesian_2cell_sfib (h ◃ γ).
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.DisplayedCats.StreetFibration UniMath.Bicategories.Core.Bicat UniMath.Bicategories.Core.Invertible_2cells UniMath.Bicategories.Core.Univalence