∀ {α : Type u_1} {m : MeasurableSpace α} {μ : MeasureTheory.Measure α} {β : Type u_8} [inst : NormedAddCommGroup β]
  [inst_1 : Lattice β] [HasSolidNorm β] [IsOrderedAddMonoid β] {f g : α → β},
  MeasureTheory.Integrable f μ → MeasureTheory.Integrable g μ → MeasureTheory.Integrable (f ⊔ g) μ