∀ {R : Type u_4} {ι : Type u_2} {M₂ : Type u_3} {M₃ : Type u_1} [inst : Semiring R] [inst_1 : AddCommMonoid M₂]
  [inst_2 : AddCommMonoid M₃] [inst_3 : Module R M₂] [inst_4 : Module R M₃] [inst_5 : TopologicalSpace M₂]
  [inst_6 : TopologicalSpace M₃] {ι' : Type u_5} (e : ι ≃ ι') (x : ContinuousMultilinearMap R (fun x => M₂) M₃)
  (x_1 : ι → M₂), (ContinuousMultilinearMap.domDomCongr e.symm (ContinuousMultilinearMap.domDomCongr e x)) x_1 = x x_1