fact: Definition double_cat_associator {C : category} {D : twosided_disp_cat C C} (Cm : hor_comp D) : UU := ∑ (a : double_associator_data Cm), double_associator_laws a.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.TwoSidedDisplayedCats.TwoSidedDispCat UniMath.CategoryTheory.TwoSidedDisplayedCats.Isos