useNativePay method
Implementation
static Future<String> useNativePay(Order anOrder) async {
var orderMap = {
"subtotal": anOrder.subtotal,
"tax": anOrder.tax,
"tip": anOrder.tip,
"merchantName": anOrder.merchantName
};
final String nativeToken =
await _channel.invokeMethod('nativePay', orderMap);
return nativeToken;
}