fact: Definition cat_eq_1_to_cat_eq_2 (C D : precategory_data) (DS : ∏ (x y : D), isaset (precategory_morphisms x y)) : cat_eq_1 C D ≃ cat_eq_2 C D.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.whiskering UniMath.CategoryTheory.catiso