∀ {α : Type u_2} {β : Type u_3} {γ : Type u_4} {m0 : MeasurableSpace α} [inst : MeasurableSpace β]
  [inst_1 : MeasurableSpace γ] {μ : MeasureTheory.Measure α} {f : α → β × γ},
  AEMeasurable f μ → AEMeasurable (fun x => (f x).2) μ