∀ (X : CategoryTheory.Sheaf CategoryTheory.typesGrothendieckTopology (Type u)) (X_1 : Type uᵒᵖ)
  (a : (CategoryTheory.yoneda.obj (X.val.obj (Opposite.op PUnit.{u + 1}))).obj X_1),
  (CategoryTheory.typeEquiv.counitIso.hom.app X).val.app X_1 a =
    (CategoryTheory.evalEquiv X.val ⋯ (Opposite.unop X_1)).symm a