∀ {ι : Type u_1} {α : ι → Type u_3} [inst : Fintype ι] [inst_1 : (i : ι) → MeasurableSpace (α i)]
  (μ : (i : ι) → MeasureTheory.Measure (α i)) [∀ (i : ι), MeasureTheory.SigmaFinite (μ i)]
  [inst_3 : (i : ι) → Group (α i)] [inst_4 : (i : ι) → TopologicalSpace (α i)] [∀ (i : ι), (μ i).IsHaarMeasure]
  [∀ (i : ι), MeasurableMul (α i)], (MeasureTheory.Measure.pi μ).IsHaarMeasure