∀ {𝕜 : Type u_1} {E : Type u_2} [inst : NontriviallyNormedField 𝕜] [inst_1 : NormedAddCommGroup E]
  [inst_2 : NormedSpace 𝕜 E] [inst_3 : CompleteSpace E] {p q : Subspace 𝕜 E} (h : IsCompl p q) (hp : IsClosed ↑p)
  (hq : IsClosed ↑q), ⇑(Submodule.prodEquivOfClosedCompl p q h hp hq).symm = ⇑(Submodule.prodEquivOfIsCompl p q h).symm