∀ {α : Type u_1} {m : MeasurableSpace α} {μ : MeasureTheory.Measure α} {ε' : Type u_8} [inst : TopologicalSpace ε']
  [inst_1 : ESeminormedAddMonoid ε'] [ContinuousAdd ε'] {f g : α → ε'},
  MeasureTheory.Integrable f μ → MeasureTheory.Integrable g μ → MeasureTheory.Integrable (fun x => f x + g x) μ