{C : Type u} →
  [inst : CategoryTheory.Category.{v, u} C] →
    [inst_1 : CategoryTheory.Preadditive C] →
      [inst_2 : CategoryTheory.Limits.HasFiniteBiproducts C] →
        CategoryTheory.Functor.id (C ⥤ₗ AddCommGrpCat) ≅
          ((CategoryTheory.LeftExactFunctor.whiskeringRight C AddCommGrpCat (Type v)).obj
                (CategoryTheory.LeftExactFunctor.of (CategoryTheory.forget AddCommGrpCat))).comp
            AddCommGrpCat.leftExactFunctorForgetEquivalence.inverse