∀ {R : Type u} {ι : Type v} {M₂ : Type w₂} {M₃ : Type w₃} [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_1} (e : ι ≃ ι') (f : ContinuousMultilinearMap R (fun x => M₂) M₃),
  (ContinuousMultilinearMap.domDomCongrEquiv e).symm f = ContinuousMultilinearMap.domDomCongr e.symm f