∀ {G : Type u_2} [inst : Group G] [inst_1 : TopologicalSpace G] [IsTopologicalGroup G] [LocallyCompactSpace G]
  [inst_4 : MeasurableSpace G] [BorelSpace G] {μ : MeasureTheory.Measure G} [μ.IsMulLeftInvariant]
  [MeasureTheory.IsFiniteMeasureOnCompacts μ] [μ.InnerRegularCompactLTTop],
  μ.InnerRegularWRT (fun s => ∃ f, Continuous f ∧ HasCompactSupport f ∧ s = f ⁻¹' {1}) fun s =>
    MeasurableSet s ∧ μ s ≠ ⊤