fact: Definition relmodule_precategory_ob_mor : precategory_ob_mor := make_precategory_ob_mor (RelModule R) RelModule_Mor.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.Monads.RelativeMonads