∀ {G : Type u_6} {α : Type u_7} [inst : One G] [inst_1 : SMul G α] [inst_2 : MeasurableSpace α]
  {ν : autoParam (MeasureTheory.Measure α) MeasureTheory.HasFundamentalDomain._auto_1},
  (∃ s, MeasureTheory.IsFundamentalDomain G s ν) → MeasureTheory.HasFundamentalDomain G α ν