fact: Definition precategory_morphism_from_sub_precategory_morphism (C:category) (C':sub_precategories C) (a b : ob C) (f : sub_precategory_morphisms C' a b) : a --> b := pr1 f .
imports: UniMath.Foundations.Sets UniMath.MoreFoundations.PartA UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.Isos