{motive : Lean.Expr → Sort u} →
  (t : Lean.Expr) →
    ((mvarId : Lean.MVarId) → motive (Lean.Expr.mvar mvarId)) →
      ((declName : Lean.Name) → (us : List Lean.Level) → motive (Lean.Expr.const declName us)) →
        ((typeName : Lean.Name) → (idx : ℕ) → (struct : Lean.Expr) → motive (Lean.Expr.proj typeName idx struct)) →
          (Nat.hasNotBit 2068 t.ctorIdx → motive t) → motive t