(motive : Option (ℕ × Array Lean.Expr) → Sort u_1) →
  (x : Option (ℕ × Array Lean.Expr)) →
    ((funidx : ℕ) → (snd : Array Lean.Expr) → motive (some (funidx, snd))) →
      ((x : Option (ℕ × Array Lean.Expr)) → motive x) → motive x