∀ {J : Type u_3} [inst : CategoryTheory.Category.{u_1, u_3} J] {C : Type u_4}
  [inst_1 : CategoryTheory.Category.{u_2, u_4} C] [inst_2 : CategoryTheory.Limits.HasColimitsOfShape J C]
  (X : CategoryTheory.Functor J C),
  CategoryTheory.Limits.colimMap (CategoryTheory.CategoryStruct.id X) =
    CategoryTheory.CategoryStruct.id (CategoryTheory.Limits.colimit X)