fact: Definition data_cat_eq_1_to_2 (C D : precategory_data) (Fo : (ob C) = ob D) : data_cat_eq_1 C D Fo ≃ data_cat_eq_2 C D Fo.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.whiskering UniMath.CategoryTheory.catiso