(motive : Option (Lean.Expr × Subarray Lean.Expr) → Sort u_1) →
  (x : Option (Lean.Expr × Subarray Lean.Expr)) →
    (Unit → motive none) → ((x : Lean.Expr) → (s' : Subarray Lean.Expr) → motive (some (x, s'))) → motive x