∀ {C : Type u₁} [inst : CategoryTheory.Category.{v₁, u₁} C] (X : Type (max u₁ u₂)) [inst_1 : Unique X]
  (X_1 : CategoryTheory.Functor C (Type (max u₁ u₂)))
  (a : (CategoryTheory.coyoneda.obj (Opposite.op ((CategoryTheory.Functor.const C).obj X))).obj X_1) (j : C),
  ↑((CategoryTheory.sectionsFunctorNatIsoCoyoneda X).inv.app X_1 a) j = a.app j default