Definition laxleftunitor_to_lunitor_nat {C : category} {tu : tensor_unit C} (lu : laxleftunitor tu) : leftunitor_nat lu := pr2 lu.
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.All. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Monoidal.WhiskeredBifunctors. Require Import UniMath.CategoryTheory.Monoidal.Categories.