Sort u →
  {C : Type u₁} →
    [inst : CategoryTheory.Category.{v₁, u₁} C] →
      {X Y : CategoryTheory.Core C} →
        CategoryTheory.CoreHom X Y →
          {C' : Type u₁} →
            [inst' : CategoryTheory.Category.{v₁, u₁} C'] →
              {X' Y' : CategoryTheory.Core C'} → CategoryTheory.CoreHom X' Y' → Sort u