∀ {G : Type u} {α : Type w} {m : MeasurableSpace α} [inst : Group G] [inst_1 : MulAction G α]
  {μ : MeasureTheory.Measure α} [MeasureTheory.SMulInvariantMeasure G α μ] (c : G) {s t : Set α},
  c • s =ᵐ[μ] c • t ↔ s =ᵐ[μ] t