fact: Definition has_homsets_carrier_of_subcategory (C : category) (C' : sub_precategories C) : has_homsets (carrier_of_sub_precategory C C').
imports: UniMath.Foundations.Sets UniMath.MoreFoundations.PartA UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.Isos