∀ {M : Type u_2} {α : Type u_4} [inst : AddCommMonoid M] [inst_1 : MeasurableSpace M] [MeasurableAdd₂ M]
  {m : MeasurableSpace α} (s : Multiset (α → M)),
  (∀ f ∈ s, Measurable f) → Measurable fun x => (Multiset.map (fun f => f x) s).sum