fact: Definition isaprop_twosided_disp_cat_axioms (D : twosided_disp_cat_data) : isaprop (twosided_disp_cat_axioms D).
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.DisplayedCats.Core UniMath.CategoryTheory.PrecategoryBinProduct