∀ {α : Type u_2} {m : MeasurableSpace α} {μ : MeasureTheory.Measure α} {t : Set α} {ι : Sort u_3} [Countable ι]
  {s : ι → Set α}, MeasureTheory.AEDisjoint μ (⋃ i, s i) t = ∀ (i : ι), MeasureTheory.AEDisjoint μ (s i) t