∀ {X : Type u_1} {R : Type u_2} [inst : Zero R] [inst_1 : TopologicalSpace X] [inst_2 : TopologicalSpace R] {s : Set X}
  [inst_3 : Zero ↑s] {f : X → R} {g : ContinuousMapZero (↑s) R},
  ¬ContinuousOn f s → ContinuousMapZero.mkD (s.restrict f) g = g