∀ {α : Type u_1} {γ : Type u_3} [inst : MeasurableSpace α] {μ : MeasureTheory.Measure α} [inst_1 : TopologicalSpace γ]
  [inst_2 : Group γ] [inst_3 : IsTopologicalGroup γ] (f : α →ₘ[μ] γ), f⁻¹.toGerm = f.toGerm⁻¹