∀ {α : Type u_1} {δ : Type u_4} {ε : Type u_5} {m : MeasurableSpace α} {μ : MeasureTheory.Measure α}
  [inst : MeasurableSpace δ] [inst_1 : TopologicalSpace ε] [inst_2 : ContinuousENorm ε] {ν : MeasureTheory.Measure δ}
  {g : δ → ε} {f : α → δ},
  MeasureTheory.MeasurePreserving f μ ν → MeasureTheory.Integrable g ν → MeasureTheory.Integrable (g ∘ f) μ