addToWishlist method

Implementation

@override
Future<bool> addToWishlist(String sku) async {
  try {
    final result = await methodChannel.invokeMethod<bool>('addToWishlist', {
      'sku': sku,
    });
    return result ?? false;
  } catch (e) {
    _error = e.toString();
    return false;
  }
}