fact: Definition disp_functor_ff_reflects_isos {x y} {xx : D x} {yy : D y} {f : z_iso x y} (ff : xx -->[f] yy) (isiso: is_z_iso_disp (functor_on_z_iso F f) (♯ FF ff)) : is_z_iso_disp _ ff.
imports: UniMath.Foundations.Sets UniMath.MoreFoundations.PartA UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.DisplayedCats.Core UniMath.CategoryTheory.DisplayedCats.Isos