fact: Definition disp_depprod_bicat_idtotiso_2_1 {a b : B} {f : B ⟦ a, b ⟧} {aa : disp_depprod_bicat a} {bb : disp_depprod_bicat b} (ff : aa -->[ f] bb) (gg : aa -->[ f] bb) : ff = gg ≃ disp_invertible_2cell (id2_invertible_2cell f) ff gg := ((disp_depprod_bicat_disp_invertible_2cell_weq ff gg) ∘ weqonsecfibers _ _ (λ i, make_weq _ (HD_2_1 i _ _ _ _ (idpath _) _ _ (ff i) (gg i))) ∘ invweq (weqfunextsec _ _ _))%weq.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.PrecategoryBinProduct UniMath.Bicategories.Core.Bicat UniMath.Bicategories.Core.BicategoryLaws UniMath.Bicategories.Core.Invertible_2cells UniMath.CategoryTheory.DisplayedCats.Core UniMath.Bicategories.DisplayedBicats.DispBicat UniMath.Bicategories.DisplayedBicats.DispUnivalence UniMath.Bicategories.Core.Unitors UniMath.Bicategories.Morphisms.Adjunctions UniMath.Bicategories.Core.Univalence