fact: Definition id_mor_of_street_fib {B E : category} (P : E ⟶ B) : mor_of_street_fib P P := functor_identity _ ,, functor_identity _ ,, identity_preserves_cartesian _ ,, id_mor_of_street_fib_nat_z_iso P.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Univalence UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.DisplayedCats.Core UniMath.CategoryTheory.DisplayedCats.Total UniMath.CategoryTheory.DisplayedCats.Fibrations