fact: Definition lunitor_data {C : category} (tu : tensor_unit C) : UU := ∏ x : C, C⟦I_{tu} ⊗_{tu} x, x⟧.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.Core.Isos