fact: Definition leftunitor_data {C : category} (T : tensor_data C) (I : C) : UU := ∏ (x : C), C ⟦I ⊗_{T} x, x⟧.
imports: UniMath.Foundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.Isos