fact: Definition rightunitor_is_natiso {C : category} {T : tensor_data C} {I : C} (ru : rightunitor_data T I) : UU := ∏ (x : C), is_z_isomorphism (ru x).
imports: UniMath.Foundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.Isos