∀ {𝕜 : Type u_1} [inst : NontriviallyNormedField 𝕜] {E : Type u_2} [inst_1 : NormedAddCommGroup E]
  [inst_2 : NormedSpace 𝕜 E] {E' : Type u_5} [inst_3 : NormedAddCommGroup E'] [inst_4 : NormedSpace 𝕜 E']
  (f : E →L[𝕜] E'), MDifferentiable (modelWithCornersSelf 𝕜 E) (modelWithCornersSelf 𝕜 E') ⇑f