fact: Definition transported_comonoid_counit_data : L⟦a, monoidal_unit L⟧.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.DisplayedCats.Core UniMath.CategoryTheory.Monoidal.Categories UniMath.CategoryTheory.Monoidal.Comonoids.Category UniMath.CategoryTheory.Retracts