∀ {α : Type u_1} {β : Type u_2} [inst : TopologicalSpace α] [inst_1 : TopologicalSpace β] (f : α ≃ₜ β)
  {a b : TopologicalSpace.Opens α},
  { toFun := ⇑(TopologicalSpace.Opens.comap ↑f.symm), invFun := ⇑(TopologicalSpace.Opens.comap ↑f), left_inv := ⋯,
          right_inv := ⋯ }
        a ≤
      { toFun := ⇑(TopologicalSpace.Opens.comap ↑f.symm), invFun := ⇑(TopologicalSpace.Opens.comap ↑f), left_inv := ⋯,
          right_inv := ⋯ }
        b ↔
    a ≤ b