proposition: Proposition isaset_double_cat_runitor {C : category} {D : twosided_disp_cat C C} (I : hor_id D) (Cm : hor_comp D) : isaset (double_cat_runitor I Cm).
proof: Proof. use isaset_total2. - apply isaset_double_runitor_data. - intro. apply isasetaprop. apply isaprop_double_runitor_laws. Qed.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.TwoSidedDisplayedCats.TwoSidedDispCat UniMath.CategoryTheory.TwoSidedDisplayedCats.Isos