fact: Definition precompose_identity {A : enriched_precat} {x y : A} : precompose_underlying_morphism y (enriched_cat_identity x) = identity _.
imports: UniMath.Foundations.PartA UniMath.Foundations.Propositions UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.Monoidal.Categories UniMath.CategoryTheory.PrecategoryBinProduct UniMath.CategoryTheory.Core.Isos