(motive : Option (Lean.MVarId × Lean.FVarId) → Sort u_1) →
  (__do_lift : Option (Lean.MVarId × Lean.FVarId)) →
    ((newMVarId : Lean.MVarId) → (newFVarId : Lean.FVarId) → motive (some (newMVarId, newFVarId))) →
      ((x : Option (Lean.MVarId × Lean.FVarId)) → motive x) → motive __do_lift