∀ {X : Type u_1} {E : Type u_3} {mX : MeasurableSpace X} [inst : NormedAddCommGroup E] [inst_1 : NormedSpace ℝ E]
  {f : X → E} {μ : MeasureTheory.Measure X}, ∫ (x : X) in Set.univ, f x ∂μ = ∫ (x : X), f x ∂μ