∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] [inst_1 : CategoryTheory.CartesianMonoidalCategory C] (X : C)
  (F : CategoryTheory.Functor Cᵒᵖ GrpCat) (α : (F.comp (CategoryTheory.forget GrpCat)).RepresentableBy X),
  (CategoryTheory.yonedaGrpObjIsoOfRepresentableBy X F α).hom =
    { app := fun X_1 => GrpCat.ofHom ↑{ toEquiv := α.homEquiv, map_mul' := ⋯ }, naturality := ⋯ }