proposition: Proposition isaset_double_runitor_data {C : category} {D : twosided_disp_cat C C} (I : hor_id D) (Cm : hor_comp D) : isaset (double_runitor_data I Cm).
proof: Proof. use impred_isaset ; intro x. use impred_isaset ; intro y. use impred_isaset ; intro h. apply isaset_iso_twosided_disp. Qed.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.TwoSidedDisplayedCats.TwoSidedDispCat UniMath.CategoryTheory.TwoSidedDisplayedCats.Isos