{P : Sort u} →
  {toConstantVal : Lean.ConstantVal} →
    {isUnsafe : Bool} →
      {toConstantVal' : Lean.ConstantVal} →
        {isUnsafe' : Bool} →
          { toConstantVal := toConstantVal, isUnsafe := isUnsafe } =
              { toConstantVal := toConstantVal', isUnsafe := isUnsafe' } →
            (toConstantVal = toConstantVal' → isUnsafe = isUnsafe' → P) → P