∀ {G : Type u_1} [inst : MeasurableSpace G] [inst_1 : DivisionMonoid G] [MeasurableMul G] [MeasurableInv G]
  (μ : MeasureTheory.Measure G) [μ.IsInvInvariant] [μ.IsMulLeftInvariant] (g : G),
  MeasureTheory.Measure.map (fun t => g / t) μ = μ